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Butter Tart Squares

Lisa

By Lisa

Feb 26, 2026

15 min prep
30 min cook
12 servings
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Butter Tart Squares

Welcome to the sweet side of life with these delightful Butter Tart Squares! Imagine biting into a soft, buttery crust that crumbles just right, giving way to a rich, gooey filling that dances with caramel notes. Whether you’re treating yourself or sharing with loved ones, these squares promise to bring a smile to any face!

Perfect for gatherings or a cozy afternoon at home, Butter Tart Squares are a classic Canadian dessert that combines the warmth of nostalgia with the joy of indulgence. Get ready to create a batch that will have everyone begging for the recipe!

Why You'll Love This Recipe

  • Irresistibly Gooey Filling: The filling is a luscious blend of brown sugar and butter, creating a caramel-like texture that melts in your mouth.
  • Perfectly Buttery Crust: The tender, buttery crust provides a delightful contrast to the rich filling, ensuring every bite is a symphony of flavors.
  • Customizable Delight: Add raisins or other mix-ins to make them your own; the possibilities are endless!
  • Easy to Make: With simple ingredients and straightforward steps, these squares are a breeze to whip up, even for beginner bakers.

About the Ingredients

All-Purpose Flour

This staple ingredient forms the base of the crust, providing the necessary structure and texture that holds these squares together beautifully.

Powdered Icing Sugar

Adding a touch of sweetness and creating a tender crust, powdered icing sugar helps achieve that melt-in-your-mouth experience.

Unsalted Butter

Cold and cubed butter adds richness and flavor to both the crust and the filling, ensuring a buttery taste in every bite.

Brown Sugar

This lightly packed sweetener is the heart of the filling, contributing deep caramel flavors that elevate these squares to a whole new level of deliciousness.

Large Eggs

Eggs act as a binding agent in the filling, providing structure and moisture, ensuring the filling sets perfectly while remaining gooey.

White Vinegar

A secret ingredient that balances the sweetness and enhances the flavors, white vinegar adds a subtle tang that makes the filling irresistible.

Tips & Tricks

Chill Your Butter

Using cold butter is key for a flaky crust; it creates that wonderful texture we all love in a buttery tart.

Don’t Skip the Cooling

Allowing the crust to cool slightly before adding the filling prevents it from becoming soggy and helps maintain the perfect texture.

Check the Filling Consistency

When baking, the filling should be set but still slightly jiggly in the center, ensuring the perfect gooeyness once cooled.

Use Parchment Paper

Line your baking pan with parchment for easy removal; this simple step makes slicing the squares a breeze!

Pro Tips

  • Use Cold Ingredients: Ensure your butter is cold for the crust and eggs are at room temperature for a well-mixed filling.
  • Measure Carefully: Accurate measurements are crucial for achieving the right texture and flavor balance.
  • Let Them Chill: Refrigerate the squares for at least 4 hours before slicing to enhance the texture and make cutting easier.
  • Experiment with Add-Ins: Try adding chopped nuts, chocolate chips, or dried fruit for a unique twist on the classic recipe.

Step-by-Step Instructions

Prepare Your Oven and Pan

Preheat your oven to 350°F (175°C) and line a 9x13-inch baking pan with parchment paper, lightly spraying it with non-stick spray for easy removal.

Make the Crust

In a large bowl, mix the all-purpose flour and powdered icing sugar. Cut in the cold, cubed butter until the mixture resembles pea-sized crumbs.

Press and Bake the Crust

Firmly press the crust mixture into the prepared pan and bake for 10 minutes. Set aside to cool slightly while you prepare the filling.

Prepare the Filling

In a microwave-safe bowl, melt the butter and whisk in the brown sugar until smooth. Add eggs one at a time, whisking after each addition, then stir in the vinegar and vanilla.

Pour and Bake

Pour the prepared filling over the pre-baked crust, spreading it evenly. Bake for 25-30 minutes until the filling is set but still slightly jiggly in the center. Allow to cool completely before slicing.

Delicious Variations

Nutty Twist

Add chopped pecans or walnuts to the filling for a delightful crunch that complements the gooey texture.

Chocolate Lovers

Incorporate chocolate chips into the filling for a rich, decadent treat that takes these squares to a whole new level.

Fruit Fusion

Mix in dried cranberries or chopped apricots for a fruity variation that adds a lovely tartness to balance the sweetness.

How to Store Butter Tart Squares

Refrigerator

Store in an airtight container in the fridge for up to one week. The flavor only gets better as they sit!

Freezer

Freeze squares in an airtight container for up to 3 months. Just thaw in the refrigerator before serving for the best taste.

Reheating

To enjoy warm, reheat squares in the microwave for a few seconds, ensuring not to overheat and lose that gooey texture.

Frequently Asked Questions

Can I use a different type of flour?

While all-purpose flour is ideal, you can experiment with gluten-free flour blends for a gluten-free version.

What if I don’t have raisins?

Feel free to leave them out, or substitute with your favorite dried fruit or chocolate chips for a different flavor profile.

How do I know when the squares are done baking?

The filling should be set but slightly jiggly in the center. It will firm up as it cools.

Can I make these ahead of time?

Absolutely! These squares can be made a day in advance and stored in the refrigerator until you’re ready to serve.

Now that you have all the secrets to making these delightful Butter Tart Squares, it’s time to roll up your sleeves and get baking! Your friends and family will thank you for this delicious treat that brings joy to any occasion. Enjoy every gooey, buttery bite!

Butter Tart Squares

Butter Tart Squares

Rich and gooey squares with a tender buttery crust, filled with a sweet, caramel-like filling that can include raisins for a classic twist.

15 min
Prep Time
30 min
Cook Time
12
Servings
350 kcal
Calories

Ingredients

Instructions

  1. 1 Preheat oven to 350°F (175°C). Line a 9x13-inch baking pan with parchment paper and lightly spray with non-stick spray.
  2. 2 In a large bowl, mix flour and powdered icing sugar. Cut in the cold, cubed butter using a pastry cutter or hands until pea-sized pieces form.
  3. 3 If the mixture is too crumbly, add 1-2 tablespoons of cold water until it holds together when pressed.
  4. 4 Press the crust mixture firmly and evenly into the prepared pan. Bake for 10 minutes and set aside to cool slightly.
  5. 5 In a microwave-safe bowl, melt 1/2 cup unsalted butter. Whisk in the brown sugar until smooth.
  6. 6 Add eggs one at a time, whisking thoroughly after each addition.
  7. 7 Stir in the white vinegar and vanilla extract until fully combined. Fold in raisins if using.
  8. 8 Pour the filling over the pre-baked crust and spread evenly.
  9. 9 Bake for 25-30 minutes until the filling is set but slightly jiggly in the center.
  10. 10 Cool completely at room temperature, then refrigerate for at least 4 hours before slicing into squares.

Chef's Note

For a richer flavor, lightly toast the raisins before folding them into the filling. Serve chilled for best texture.

Servings: 12

Cuisine: Canadian, North American

Course: Dessert

Nutrition (per serving): 6gg protein