Last Updated on August 20, 2026 by Rita

Biscoff Blondie Mug Cake is a quick single-serving dessert with warm cookie-butter flavor that takes less than 5 minutes from start to finish. It cooks in the microwave for only 60 to 70 seconds and delivers a soft, tender, moist center with rich brown sugar and cinnamon notes. I love recipes like this because they remind me of baking beside my grandmother, only now I can create that comforting sweetness in one mug in my Oregon kitchen. This Biscoff Blondie Mug Cake gives me an easy way to satisfy a late-night dessert craving without baking a whole batch of blondies.

If you love that unmistakable spiced cookie-butter flavor, you’ll also want to try my Biscoff Mug Cake.

Table of Contents

Key Ingredients for Making Biscoff Blondie Mug Cake

Biscoff Blondie Mug Cake ingredients with Biscoff spread — Biscoff spread, oil, vanilla, milk, brown sugar, cinnamon, salt, baking powder, and flour.

The ingredients for Biscoff Blondie Mug Cake create its sweet, warmly spiced flavor and tender texture. Start with 3 tablespoons Biscoff spread, then add 1 tablespoon neutral oil, 1/2 teaspoon vanilla, and 4 tablespoons milk. Next, use 2 tablespoons brown sugar, although granulated sugar also works. You’ll also need 1/4 teaspoon cinnamon, 1/8 teaspoon salt, 1/2 teaspoon baking powder, and 4 tablespoons all-purpose flour. Biscoff provides the signature cookie-butter flavor, while brown sugar adds richer caramel notes. Meanwhile, baking powder gives the batter lift, and a neutral oil keeps strong flavors from competing with the Biscoff.

For another rich single-serving treat with caramel notes, try my Caramel Mug Cake Recipe.

How to Make Biscoff Blondie Mug Cake in 4 Steps

Making Biscoff Blondie Mug Cake takes four simple steps and less than 5 minutes from start to finish.

Step 1: Melt the Biscoff Spread

Place 3 tablespoons Biscoff spread in a large microwave-safe mug. Then, microwave it for 20 seconds so it melts and mixes more easily.

Step 2: Mix the Batter

Add 1 tablespoon neutral oil, 1/2 teaspoon vanilla, and 4 tablespoons milk to the melted Biscoff. Mix well. Next, add 2 tablespoons brown sugar, 1/4 teaspoon cinnamon, 1/8 teaspoon salt, 1/2 teaspoon baking powder, and 4 tablespoons all-purpose flour. Gently mix everything together with a fork.

Mixing Biscoff Blondie Mug Cake batter in a mug — Melt the Biscoff spread, then gently mix the remaining ingredients into the mug.

Step 3: Microwave for 60 to 70 Seconds

Microwave the mug cake for 60 seconds. Check the center, then cook for up to another 10 seconds if necessary. The top can still look slightly wet in the middle.

Step 4: Cool and Enjoy

Allow the mug cake to cool slightly before adding toppings or eating. Avoid overcooking because the cake continues to set as it cools.

Biscoff Blondie Mug Cake after microwaving — Microwave the Biscoff blondie mug cake for 60 to 70 seconds, then let it cool slightly.

For another quick blondie-style dessert, try my Chocolate Chip Blondie Mug Cake.

Essential Tools for Making This Recipe

You only need a few everyday kitchen tools to make Biscoff Blondie Mug Cake. First, choose a large microwave-safe mug that gives the batter enough room to expand while cooking. Ideally, the batter should fill only about half the mug before it goes into the microwave. Next, use measuring spoons to portion the Biscoff spread, oil, vanilla, milk, brown sugar, cinnamon, salt, baking powder, and flour accurately. A simple fork works perfectly for combining everything directly in the mug. Finally, you need a microwave to melt the Biscoff for 20 seconds and cook the finished batter for 60 to 70 seconds.

For another simple microwave dessert that requires minimal equipment, try my Cinnamon Roll Mug Cake.

The Health Benefits of Biscoff Blondie Mug Cake

A Biscoff Blondie Mug Cake works best as an occasional single-serving dessert rather than a nutrient-focused recipe. However, its individual portion makes serving size straightforward, so you can satisfy a sweet craving without preparing a full tray of blondies. Milk contributes some protein and calcium, while the recipe keeps preparation simple with familiar ingredients. Additionally, you can enjoy the mug cake fresh, which means you don’t need to store a large batch of dessert. I especially appreciate the portion-friendly format because I can make exactly what I want. For balance, simply enjoy this rich Biscoff treat as part of your overall eating pattern.

For a lighter single-serving alternative, try my 50 Calorie Mug Cake.

Expert Tips for the Best Texture

For the best Biscoff Blondie Mug Cake, avoid overcooking because the cake continues to set while it cools. First, microwave it for 60 seconds, then check the center. If necessary, add another 10 seconds. A slightly wet-looking center works well and helps keep the texture tender and moist. Additionally, mix the batter only until the ingredients combine because overmixing can make the cake less tender. Choose a large mug, and fill it only about halfway with batter so it has room to expand. Finally, let the finished cake cool slightly before eating or topping it with ice cream, Biscoff spread, or Biscoff cookie crumbs.

For another warmly spiced microwave dessert, try my Chai Spice Mug Cake.

Variations of Biscoff Blondie Mug Cake

You can customize Biscoff Blondie Mug Cake while keeping the original base simple. For extra Biscoff flavor, top the warm cake with a little more Biscoff spread after cooking. Alternatively, crumble Biscoff cookies over the top for extra texture. A scoop of vanilla ice cream also pairs well with the warm cinnamon and cookie-butter flavors. For the sugar, you can swap the 2 tablespoons brown sugar for granulated sugar, although brown sugar creates a richer caramel taste. Additionally, you can use canola or coconut oil as your neutral oil. However, avoid strongly flavored oils because they can compete with the Biscoff flavor.

For another warm vanilla-and-spice combination, try my Matcha Vanilla Mug Cake.

Storage and Reheating Tips for Biscoff Blondie Mug Cake

I recommend enjoying Biscoff Blondie Mug Cake fresh because its soft, tender texture tastes best on the day you make it. However, if you have leftovers, let the cake cool completely, then cover the mug and store it in the refrigerator. When you want to enjoy it again, microwave it briefly just until warm. Avoid reheating it for too long because extra microwave time can dry out the blondie-like center. Additionally, I don’t recommend freezing this mug cake because the texture won’t hold up as well. For the best experience, make one serving and enjoy it slightly warm with your favorite topping.

For another cozy cookie-inspired microwave dessert, try my Cookie Butter Mug Cake.

Common Mistakes to Avoid When Making Biscoff Blondie Mug Cake

A few small mistakes can change the texture of Biscoff Blondie Mug Cake. First, avoid overcooking it. Microwave the batter for 60 seconds, check the center, and add only another 10 seconds when needed. A slightly wet-looking middle is fine because the cake continues to cook and set as it cools. Additionally, don’t overmix the batter, since too much mixing can make the finished cake less tender. Choose a large microwave-safe mug and make sure the batter fills only about half of it before cooking. Finally, use a neutral oil instead of a strongly flavored oil, such as olive oil, so the Biscoff flavor stays prominent.

For another soft, cookie-inspired dessert, try my Microwave Mug Sugar Cookie Recipe.

Frequently Asked Questions About Biscoff Blondie Mug Cake

What is a Biscoff Blondie?

A Biscoff blondie combines the rich, caramelized spice flavor of Biscoff cookie butter with the soft, sweet character associated with blondies. This Biscoff Blondie Mug Cake turns those flavors into a convenient single-serving microwave dessert.

How to make blondie in a mug?

Melt 3 tablespoons Biscoff spread for 20 seconds. Mix in oil, vanilla, and milk. Then, add brown sugar, cinnamon, salt, baking powder, and flour. Microwave for 60 to 70 seconds, and let it cool slightly before eating.

What are the ingredients for making Biscoff Blondie?

For this recipe, you need 3 tablespoons Biscoff spread, 1 tablespoon neutral oil, 1/2 teaspoon vanilla, 4 tablespoons milk, 2 tablespoons brown sugar, 1/4 teaspoon cinnamon, 1/8 teaspoon salt, 1/2 teaspoon baking powder, and 4 tablespoons all-purpose flour.

Can I make a Biscoff mug cake without using Biscoff spread?

Not with this specific recipe. Biscoff spread provides the signature cookie-butter flavor and forms an important part of the batter. Replacing it would create a different mug cake and could change both the flavor and texture.

For another rich single-serving cake with warm caramel flavor, try my Butterscotch Mug Cakes.

Why You’ll Love This Biscoff Blondie Mug Cake

I love Biscoff Blondie Mug Cake because it delivers the cozy cookie-butter flavor of Biscoff in one warm, single-serving dessert. Better yet, the entire recipe takes less than 5 minutes, while the microwave handles the actual cooking in only 60 to 70 seconds. Brown sugar adds rich caramel notes, while cinnamon and vanilla complement the warmly spiced Biscoff spread. Plus, you only need one large mug and a fork for most of the preparation. Whenever I want something sweet without baking a whole pan of blondies, this soft, tender mug cake gives me exactly the quick homemade treat I’m craving.

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Biscoff Blondie Mug Cake: Easy 5-Minute Sweet Treat