Last Updated on August 4, 2026 by Rita

Twix Mug Cakes are rich, single-serving chocolate desserts made with self-raising flour, brown sugar, butter, oil, milk, caramel, and chopped Twix bars. These Twix Mug Cakes cook in the microwave in just 60 to 90 seconds, creating a soft, fluffy cake with a gooey caramel center, crunchy shortbread pieces, and melted chocolate in every bite. If you’re craving a quick chocolate dessert without baking a full cake, Twix Mug Cakes are the perfect choice for a fast homemade treat.

I still remember making one of my first Twix Mug Cake in my sunny Oregon kitchen after thinking about the comforting desserts my grandmother loved to share. Watching the caramel melt into the warm cake and the chocolate become perfectly gooey reminded me that the simplest recipes often bring the biggest smiles. Since then, Twix Mug Cake have become one of my favorite microwave desserts whenever I want bakery-style flavor in just a few minutes.

If you enjoy quick chocolate desserts, you’ll also love Chocolate Peanut Butter Mug Cake for another rich and easy microwave favorite.

Table of Contents

What Are Twix Mug Cakes?

Twix Mug Cakes are single-serving microwave cakes inspired by the classic Twix candy bar. They combine soft cake, gooey caramel, crunchy shortbread, and melted milk chocolate in one warm dessert. Unlike a traditional cake, Twix Mug Cakes cook in just 60 to 90 seconds, making them perfect when you want a rich chocolate treat without turning on the oven.

I love making Twix Mug Cakes because they capture everything I enjoy about a Twix bar in a fluffy mug cake. The self-raising flour creates a light texture, while the brown sugar adds a deep caramel flavor. A spoonful of caramel in the center melts as the cake cooks, and the chopped Twix bars or crushed shortbread add the signature buttery crunch. A few pieces of milk chocolate on top finish the dessert with extra richness.

One of the best things about Twix Mug Cake is how quickly they come together. Everything mixes directly in one microwave-safe mug, making preparation and cleanup incredibly easy. Whether you’re treating yourself after dinner or satisfying an afternoon chocolate craving, this recipe delivers a warm homemade dessert in only a few minutes.

If you enjoy candy-inspired microwave desserts, you’ll also love Biscoff Mug Cake for another rich and indulgent single-serving treat.

Key Ingredients for Making Twix Mug Cakes

These Twix Mug Cakes use simple baking ingredients to recreate the classic flavors of a Twix bar. Each ingredient helps build the soft cake, gooey caramel center, crunchy shortbread, and rich chocolate topping.

Ingredients for Twix Mug Cakes — Everything needed to make Twix Mug Cakes.

6 tablespoons self-raising flour
- Creates the light and fluffy structure of the mug cake.
- Helps the cake rise beautifully in the microwave.
4 tablespoons light brown sugar
- Adds sweetness with a rich caramel flavor.
- Keeps the cake moist and tender.
1 large egg
- Binds the ingredients together.
- Gives the cake a soft, airy texture.
2 tablespoons melted butter
- Adds richness and buttery flavor.
- Creates a moist crumb.
2 tablespoons vegetable oil
- Helps keep the Twix Mug Cakes soft after cooking.
- Adds extra moisture for a tender texture.
4 tablespoons warm milk
- Blends the batter smoothly.
- Creates the perfect consistency for microwave baking.
1/4 teaspoon vanilla extract
- Enhances the chocolate and caramel flavors.
- Adds a warm homemade aroma.
2 tablespoons caramel
- Creates the signature gooey center.
- Melts into the cake while it cooks.
2 crushed shortbread biscuits or chopped Twix bars
- Add the classic buttery crunch.
- Give the Twix Mug Cakes their signature candy-bar flavor.
3 pieces milk chocolate
- Melt into the top of the cake during cooking.
- Add a rich chocolate finish to every bite.

Ingredient Tips

Use warm milk so the butter mixes easily with the other wet ingredients.
Chop the Twix bars into small pieces for even distribution throughout the cake.
Place the caramel in the center of the batter to create a gooey filling.
Push the milk chocolate pieces gently into the top before microwaving so they melt perfectly.

If you love caramel and chocolate desserts, don’t miss Salted Caramel Apple Mug Cake for another rich microwave favorite.

How to Make Twix Mug Cakes in 4 Easy Steps

Making Twix Mug Cakes is quick and simple. These Twix Mug Cakes come together in one mug with a few pantry ingredients and cook in the microwave in just 60 to 90 seconds. Follow these easy steps for a soft chocolate cake with a gooey caramel center.

Step 1: Mix the Wet Ingredients

Mixing Twix Mug Cakes batter — Mix the wet ingredients until smooth.

Crack 1 large egg into a microwave-safe mug.
Add 2 tablespoons melted butter, 2 tablespoons vegetable oil, 4 tablespoons warm milk, and 1/4 teaspoon vanilla extract.
Whisk until the mixture is smooth and well combined.

Step 2: Add the Dry Ingredients

Stir in 4 tablespoons light brown sugar and 6 tablespoons self-raising flour.
Mix until a smooth batter forms with no dry pockets remaining.
Avoid overmixing to keep the Twix Mug Cakes light and fluffy.

Step 3: Add the Filling

Spoon 2 tablespoons caramel into the center of the batter.
Add 2 crushed shortbread biscuits or chopped Twix bars over the caramel.
Press 3 pieces of milk chocolate gently into the top of the batter.

Step 4: Microwave and Serve

Fresh Twix Mug Cakes after microwaving — Twix Mug Cakes fresh from the microwave.

Microwave the Twix Mug Cakes on High for 60 to 90 seconds, depending on your microwave’s power.
The cake is ready when it has risen and the center is just set.
Let it cool for a minute or two before serving so the caramel thickens slightly and the chocolate stays perfectly melted.

Quick Recipe Summary

Prep Time: 5 minutes
Cook Time: 60–90 seconds
Total Time: About 7 minutes
Yield: 1 serving
Method: Microwave
Texture: Soft cake with a gooey caramel center, buttery shortbread pieces, and melted milk chocolate.

If you love chocolate and caramel desserts, you’ll also enjoy Chocolate Fondant Mug Cake for another warm and indulgent microwave treat.

Essential Tools for Making Twix Mug Cakes

You don’t need any special equipment to make Twix Mug Cakes. A few basic kitchen tools are enough to prepare this rich microwave dessert with a soft cake, gooey caramel center, and melted chocolate topping.

Large microwave-safe mug
- Holds the batter while it rises during cooking.
- Leaves enough room to prevent overflowing.
Small whisk or fork
- Mixes the egg, butter, oil, milk, and vanilla until smooth.
- Helps combine the batter evenly.
Measuring spoons
- Measures the flour, brown sugar, butter, oil, milk, vanilla, and caramel accurately.
- Precise measurements help create the perfect texture.
Small spoon or silicone spatula
- Stirs the batter smoothly.
- Makes it easy to layer the caramel and chopped Twix pieces in the center.
Microwave
- Cooks the Twix Mug Cakes in 60 to 90 seconds.
- Cooking time may vary depending on your microwave’s wattage.

Using these simple tools makes preparing Twix Mug Cakes quick, easy, and mess-free. Everything mixes and cooks in one mug, making cleanup just as simple as the recipe itself.

If you enjoy easy microwave desserts, be sure to try Easy Chocolate Mug Cake in Microwave for another fast homemade chocolate treat.

Expert Tips for the Best Texture

The secret to soft and fluffy Twix Mug Cakes starts with mixing the wet ingredients thoroughly. Whisk the egg, melted butter, vegetable oil, warm milk, and vanilla extract until the mixture is completely smooth before adding the dry ingredients. This helps create an even batter and a tender cake.

When you add the light brown sugar and self-raising flour, stir only until no dry flour remains. Overmixing can make Twix Mug Cakes denser instead of light and airy.

For the best caramel center, place the caramel directly in the middle of the batter and cover it with the crushed shortbread biscuits or chopped Twix pieces. Then gently press the milk chocolate pieces into the top so they melt perfectly while the cake cooks.

Microwave the Twix Mug Cakes for 60 to 90 seconds, depending on your microwave’s power. The cake should be risen with a center that is just set. Overcooking is the most common reason a mug cake becomes dry or rubbery.

Finally, let the Twix Mug Cakes cool for a minute or two before taking the first bite. This short resting time allows the caramel to thicken slightly and the chocolate to stay deliciously melted.

If you enjoy rich chocolate desserts, you’ll also love Chocolate Lava Cake Mug Recipe for another gooey microwave favorite.

Variations of Twix Mug Cakes

One of my favorite things about Twix Mug Cakes is how easy they are to customize. The rich chocolate base pairs perfectly with caramel, cookies, and chocolate, so you can create a different version every time you make it.

Extra Chocolate Twix Mug Cakes

Add a few extra pieces of milk chocolate to the batter before microwaving. The chocolate melts into the cake and creates an even richer dessert.

Double Caramel Twix Mug Cakes

Increase the caramel filling slightly for an extra gooey center. Every spoonful becomes even more indulgent with warm caramel throughout the cake.

Twix Bar Version

Replace the crushed shortbread biscuits with chopped Twix bars. This version adds the signature combination of crunchy biscuit, caramel, and milk chocolate in every bite.

Crunchy Shortbread Twix Mug Cakes

Use crushed shortbread biscuits instead of Twix pieces for a buttery crunch while keeping the rich caramel and chocolate flavors.

Chocolate Lover’s Twix Mug Cakes

Top the warm cake with extra melted milk chocolate or a drizzle of chocolate sauce before serving for an even more decadent finish.

Ice Cream Twix Mug Cakes

Serve the warm Twix Mug Cakes with a scoop of vanilla ice cream. The cold ice cream melts into the warm cake, creating a delicious contrast of temperatures.

No matter which variation you choose, Twix Mug Cakes remain a quick microwave dessert that’s ready in just a few minutes and packed with the classic flavors of chocolate, caramel, and buttery shortbread.

If you love candy-inspired desserts, be sure to try Nutella Microwave Mug Cake for another rich and irresistible chocolate treat.

Storage and Reheating Tips for Twix Mug Cakes

Twix Mug Cakes taste best when enjoyed fresh from the microwave. The warm cake has the softest texture, while the caramel stays gooey and the chocolate remains perfectly melted. As the cake cools, it naturally becomes firmer.

Room Temperature

Enjoy the Twix Mug Cakes shortly after they cool for a minute or two. Leaving the cake out for several hours is not recommended because the texture will gradually become dry.

Refrigerator

If you have leftovers, cover the mug tightly or transfer the cake to an airtight container. Store the Twix Mug Cake in the refrigerator for up to 2 days. Keep in mind that the cake will become denser after chilling.

Freezer

You can freeze Twix Mug Cakes for up to 1 month in a freezer-safe container. Thaw overnight in the refrigerator before reheating.

Reheating

Warm the Twix Mug Cakes in the microwave for 10 to 15 seconds until just heated through. Avoid overheating, as the cake can become dry and the caramel may overcook.

Best Serving Tips

For the best flavor, add a drizzle of caramel, a few chopped Twix pieces, or extra milk chocolate after reheating. Serving the cake with a scoop of vanilla ice cream also creates a delicious contrast between warm cake and cold ice cream.

If you enjoy warm chocolate desserts, be sure to try Hot Cocoa Cake in a Mug for another quick microwave favorite.

Frequently Asked Questions About Twix Mug Cakes

Can I make Twix Mug Cakes without a Twix bar?

Yes. You can make Twix Mug Cakes using crushed shortbread biscuits instead of chopped Twix bars. The shortbread provides the same buttery crunch, while the caramel and milk chocolate recreate the classic Twix-inspired flavor.

Can I use plain flour instead of self-raising flour?

Yes, but you’ll need to add a suitable raising agent because self-raising flour helps the cake rise. For the best results, follow the recipe using self-raising flour.

Why are my Twix Mug Cakes dry?

The most common reason is overcooking. Microwave the Twix Mug Cakes for 60 to 90 seconds, depending on your microwave’s power. The cake should be just set in the center. Overmixing the batter can also make the texture denser.

Can I use salted caramel instead of regular caramel?

Yes. Salted caramel works well in Twix Mug Cakes and adds a sweet-and-salty flavor that pairs perfectly with the chocolate and shortbread.

Can I make Twix Mug Cakes without an egg?

The egg helps bind the ingredients and creates a light, fluffy texture. Omitting it will change both the structure and consistency of the cake, so the results will be different from this recipe.

Can I add extra chocolate?

Absolutely. You can add extra milk chocolate pieces to the batter or sprinkle more on top after cooking for an even richer chocolate flavor.

Can I serve Twix Mug Cakes with toppings?

Yes. Twix Mug Cakes are delicious with vanilla ice cream, whipped cream, extra caramel sauce, chopped Twix pieces, or a drizzle of melted chocolate.

Can I prepare the batter in advance?

For the best texture, prepare and cook Twix Mug Cakes immediately after mixing the batter. Freshly made mug cakes rise better and have a softer texture than batter that has been left to sit.

If you enjoy caramel-filled microwave desserts, be sure to try Caramel Apple Mug Cake – The Sweetest 90-Second Comfort Fix for another quick and cozy treat.

Why You’ll Love These Twix Mug Cakes

If you love chocolate, caramel, and buttery shortbread, these Twix Mug Cakes are sure to become one of your favorite microwave desserts. They bring together the classic flavors of a Twix bar in a soft, fluffy cake that’s ready in just a few minutes.

The best part about Twix Mug Cake is how quickly they come together. Simply mix the ingredients in one mug, add the caramel and Twix filling, then microwave for 60 to 90 seconds. In almost no time, you’ll have a warm homemade dessert with a gooey caramel center and melted chocolate in every bite.

I also love that recipe use simple pantry ingredients combined with chopped Twix bars or crushed shortbread biscuits. The self-raising flour creates a light texture, while the brown sugar, caramel, and milk chocolate deliver the rich candy-bar flavor that makes this recipe so satisfying.

Another reason to make Twix Mug Cake is that they’re perfect for a single serving. There’s no need to bake an entire cake when you’re craving something sweet. Everything mixes and cooks in one mug, which means less preparation and very little cleanup afterward.

Whether you enjoy the cake on its own or serve it with vanilla ice cream, whipped cream, or an extra drizzle of caramel, Twix Mug Cake always feel like a special homemade treat. They’re rich, comforting, and incredibly easy to make whenever a chocolate craving strikes.

If you enjoy candy-inspired microwave desserts, be sure to try Chocolate Fudge Cake in a Mug for another rich and indulgent chocolate favorite.

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“If you tried this recipe, tell me how it turned out. Did you keep it gooey or cook it fully?”