Butter Tart Squares Easy Cozy Recipe

Q: What is butter tart made of?

A traditional butter tart filling is made with butter, brown sugar, eggs, and syrup , often combined with vanilla and sometimes raisins or nuts. In butter tart squares , this classic filling is poured over a shortbread crust and baked into sliceable dessert bars.

Q: How long do you cook butter tart ?

Most butter tart squares bake in two stages. The crust bakes for about 15–20 minutes , and then the filling layer bakes for 30–35 minutes . In total, the baking time is usually around 45 minutes .

Q: How long do butter tart last in the fridge?

Once sliced, butter tart squares can be stored in an airtight container in the refrigerator for up to 5 days . Keeping them chilled helps the filling stay firm and prevents the bars from becoming too sticky.

Q: Are butter tarts healthy?

Butter tarts and butter tart are considered an indulgent dessert. They contain butter, sugar, and syrup, which makes them rich and sweet. While they are not typically considered a health food, they can still be enjoyed occasionally as part of a balanced diet.

Jump to Recipe

Last Updated on March 8, 2026 by Rita

Butter tart squares are rich dessert bars made with a buttery shortbread crust and a gooey brown sugar filling, baked in about one hour. These bars capture the classic flavor of traditional butter tarts but in a simple pan recipe.

They are perfect if you want a sliceable dessert with a soft caramel-like center and crisp shortbread base. Instead of shaping individual pastry tarts, everything bakes in one pan and cuts into squares.

I first made these on a cozy weekend afternoon when I wanted something nostalgic and sweet with coffee. The smell of brown sugar and vanilla filled the kitchen, and the tray disappeared quickly.

These butter tart squares are easy, comforting, and ideal for sharing.

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Table of Contents

Ingredients and Tools for Butter Tart Squares

These butter tart squares are made with two simple layers: a buttery shortbread crust and a rich brown sugar filling. The combination creates bars with a crisp base and a gooey caramel-like topping.

ingredients for butter tart squares recipe — Ingredients needed to make butter tart squares

Base Layer (Shortbread Crust)

Ingredient	Amount
Unsalted butter, softened	1 cup
Powdered sugar	1/2 cup
All-purpose flour	2 1/4 cups

The shortbread crust forms the sturdy base of the butter tart squares. It bakes until lightly golden and holds the gooey filling perfectly.

Butter Tart Filling

Ingredient	Amount
Unsalted butter, softened	1/2 cup
Brown sugar (light or dark)	1 cup
All-purpose flour	2 tablespoons
Eggs	4 large
Vanilla extract	2 teaspoons
Dark corn syrup	3/4 cup
White vinegar	2 tablespoons
Raisins, currants, or chopped walnuts (optional)	1 cup

The filling creates the classic sweet, gooey butter tart texture. The vinegar balances the sweetness and keeps the filling from tasting overly sugary.

Tools You’ll Need

9×13 inch baking pan
Parchment paper
Mixing bowls
Electric mixer or whisk
Rubber spatula
Measuring cups and spoons
Cooling rack
Sharp knife for slicing

Using parchment paper with extra overhang helps lift the butter tart squares out of the pan easily for clean slicing.

How to Make Butter Tart Squares in 7 Steps

Making butter tart squares is simple because everything bakes in one pan. The recipe has two layers: a buttery crust and a rich brown sugar filling.

Step 1 — Prepare the Pan

Preheat the oven to 350°F (180°C).

Line a 9×13 inch baking pan with parchment paper, leaving extra paper hanging over the sides so the bars can be lifted out easily after baking.

Step 2 — Make the Shortbread Base

In a large bowl beat the softened butter and powdered sugar until fluffy.

Add the flour and mix until the dough forms a thick mixture.

Step 3 — Press the Crust into the Pan

Press the dough evenly into the bottom of the prepared pan.

Use the back of a spoon or your hands to create a smooth, even layer.

Step 4 — Bake the Base Layer

Bake the crust in the preheated oven for 15–20 minutes.

The crust should look set and turn a light golden color. Remove it from the oven but keep the oven on.

Step 5 — Prepare the Filling

While the crust bakes, make the filling.

Beat together butter, brown sugar, and flour until smooth and evenly combined.

Step 6 — Add the Remaining Filling Ingredients

Beat in the eggs and vanilla extract until smooth.

Mix in the corn syrup and vinegar, then stir in the optional raisins, currants, or chopped walnuts.

Step 7 — Bake the Butter Tart Squares

Pour the filling over the partially baked crust and spread evenly.

Bake for 30–35 minutes, or until the top looks set and the filling no longer appears liquid when the pan is gently moved.

Let the butter tart squares cool completely before slicing. Cooling helps the filling set and makes clean cuts easier.

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Why This Butter Tart Squares Recipe Works

These butter tart squares turn out perfectly gooey and rich because the recipe balances a sturdy crust with a smooth, caramel-like filling. Each ingredient plays an important role in texture and flavor.

Shortbread Crust Provides Structure

The base layer uses butter, powdered sugar, and flour to create a classic shortbread crust.

This crust bakes first, which helps it stay firm enough to support the filling. As a result, the butter tart squares slice neatly while still having a soft center.

Brown Sugar Creates the Classic Flavor

Brown sugar contains molasses, which gives the filling its deep caramel taste.

This ingredient is essential for creating the signature flavor of traditional butter tarts.

Corn Syrup Produces a Smooth Filling

Corn syrup keeps the filling glossy and smooth instead of grainy.

It also helps create the gooey butter tart texture that people love.

Vinegar Balances the Sweetness

A small amount of vinegar cuts through the sweetness of the filling.

This prevents the bars from tasting overly sugary and keeps the flavor balanced.

Eggs Help the Filling Set

Eggs provide structure to the filling while it bakes.

They allow the center of the butter tart to become set but still slightly soft and chewy.

Together, these ingredients create dessert bars that are rich, sweet, and perfectly textured.

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Variations and Substitutions of Butter Tart Squares

One of the best things about butter tart is how easy they are to customize. With a few ingredient changes, you can create different flavors while keeping the same gooey filling and buttery crust.

butter tart squares recipe variations — Different variations of butter tart squares

Raisin Butter Tart Squares

This is one of the most traditional versions.

Add 1 cup raisins to the filling before baking. The raisins absorb some of the syrup and add a sweet, chewy texture.

Walnut Butter Tart Squares

For a slightly nutty flavor, stir 1 cup chopped walnuts into the filling.

Walnuts add crunch and balance the sweetness of the butter tart.

Currant Butter Tart Squares

Currants are commonly used in Canadian butter tarts.

You can mix ½ cup currants and ½ cup chopped walnuts for a balanced texture with both chewiness and crunch.

Maple Butter Tart Squares

If you prefer a deeper flavor, replace the corn syrup with pure maple syrup.

This variation gives the filling a warm maple taste while still keeping the gooey texture.

Plain Butter Tart Squares

If you prefer a smooth filling, simply leave out the raisins, currants, and nuts.

The bars will still have the rich caramel-like flavor of classic butter tarts.

Extra Gooey Butter Tart Squares

For a softer center, omit the 2 tablespoons of flour from the filling mixture.

This creates a looser filling that becomes extra gooey once baked.

These variations make it easy to adapt butter tart based on your preferred texture and flavor.

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Expert Tips for the Best Texture of Butter Tart Squares

Perfect butter tart squares depend on a few small baking techniques. These tips help ensure the bars turn out with a firm crust and a gooey filling every time.

Use Softened Butter

Softened butter blends more easily with sugar when making the crust and filling.

This helps create a smooth mixture and prevents lumps in the batter.

Press the Crust Evenly

When forming the base layer, press the dough evenly across the pan.

An even crust ensures the butter tart squares bake uniformly and hold together when sliced.

Do Not Overbake the Filling

The filling should look set but still slightly soft in the center.

If baked too long, the filling can become firm instead of gooey.

Let the Bars Cool Completely

Cooling is very important for this recipe.

If you cut the butter tart while warm, the filling will be too soft and messy.

Use Parchment Paper for Easy Removal

Lining the pan with parchment paper and leaving extra paper around the edges makes it easy to lift the bars out of the pan.

This method helps create clean slices and neat square bars.

Trim the Edges if Needed

Sometimes the outer edges bake slightly firmer.

If needed, trim the edges before slicing the butter tart for a softer and more uniform texture.

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How to Store, Reheat and Serve Butter Tart Squares

Proper storage helps keep butter tart squares fresh and maintains their soft crust and gooey filling.

Storing at Room Temperature

If you plan to eat them within a day, the squares can stay at room temperature.

Place them in an airtight container and keep them in a cool kitchen spot for up to 24 hours.

Refrigerating Butter Tart Squares

For longer storage, keep the bars in the refrigerator.

Store them in an airtight container for up to 5 days. The cool temperature helps the filling stay firm and sliceable.

Before serving, you can let the butter tart sit at room temperature for about 10–15 minutes so the filling softens slightly.

Freezing Butter Tart Squares

These dessert bars freeze very well.

Follow these steps:

Allow the squares to cool completely
Slice them into bars
Wrap each bar in plastic wrap
Store them in a freezer-safe container or bag

They can be frozen for up to 2 months.

To thaw, place the bars in the refrigerator overnight.

Reheating for a Softer Texture

If you prefer slightly warm bars, you can warm them gently.

Place a square in the microwave for 8–10 seconds. This softens the filling and brings back the gooey texture.

Serving Ideas

Butter tart squares are perfect for dessert trays, holiday baking, or afternoon coffee.

They pair nicely with:

hot coffee
tea
vanilla ice cream
whipped cream

For gatherings, cut the bars into smaller squares so guests can enjoy bite-sized portions.

serving butter tart squares with coffee — Butter tart squares served with coffee

Common Mistakes and How to Fix Them

Even simple recipes like butter tart squares can have small issues during baking. Knowing these common mistakes will help you get perfect bars every time.

The Crust Turns Too Hard

This usually happens if the crust bakes too long before adding the filling.

Bake the base only until it looks lightly golden and set, not fully browned.

The Filling Is Too Runny

If the filling stays liquid after baking, the bars likely need more time in the oven.

Bake until the top looks set and the filling does not jiggle like liquid when the pan is gently moved.

The Filling Becomes Too Firm

Overbaking can cause the filling to lose its gooey texture.

Remove the butter tart squares from the oven as soon as the center looks set.

Bars Fall Apart When Sliced

Cutting the bars while warm is the most common reason they break apart.

Allow the butter tart squares to cool completely before slicing.

The Bars Stick to the Pan

Without parchment paper, the sticky filling can cling to the pan.

Line the pan with parchment paper so the bars can be lifted out easily for slicing.

Troubleshooting Butter Tart Squares

Problem	Why it happens	How to fix it
Filling is too runny	Bars were underbaked or sliced too soon	Bake a few minutes longer and allow the bars to cool completely before cutting
Filling is too firm	The squares were baked too long	Remove from the oven as soon as the filling looks set but still soft
Crust is too hard	The base layer baked too long before adding filling	Bake the crust only until lightly golden
Bars stick to the pan	The pan was not lined properly	Line the pan with parchment paper with overhanging edges
Squares fall apart when slicing	The bars were cut while still warm	Let the butter tart squares cool fully before slicing

Frequently Asked Questions About Butter Tart Squares

What is butter tart made of?

A traditional butter tart filling is made with butter, brown sugar, eggs, and syrup, often combined with vanilla and sometimes raisins or nuts. In butter tart squares, this classic filling is poured over a shortbread crust and baked into sliceable dessert bars.

How long do you cook butter tart ?

Most butter tart squares bake in two stages. The crust bakes for about 15–20 minutes, and then the filling layer bakes for 30–35 minutes. In total, the baking time is usually around 45 minutes.

How long do butter tart last in the fridge?

Once sliced, butter tart squares can be stored in an airtight container in the refrigerator for up to 5 days. Keeping them chilled helps the filling stay firm and prevents the bars from becoming too sticky.

Are butter tarts healthy?

Butter tarts and butter tart are considered an indulgent dessert. They contain butter, sugar, and syrup, which makes them rich and sweet. While they are not typically considered a health food, they can still be enjoyed occasionally as part of a balanced diet.

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Why You’ll Love These Butter Tart Squares

These butter tart squares bring the classic flavor of traditional butter tarts into a simple, easy-to-slice dessert bar. The combination of a buttery shortbread crust and a rich brown sugar filling creates the perfect balance of crisp and gooey textures.

I love how this recipe transforms a classic pastry into something quicker and easier to bake. Instead of shaping individual tarts, everything bakes in one pan and cuts into neat squares once cooled.

They are perfect for holiday trays, family gatherings, or a cozy dessert with coffee or tea. Once you try these butter tart, they quickly become a favorite because they are rich, comforting, and incredibly satisfying.

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