Chocolate Squares

Introduction

These chocolate squares combine a buttery oat base and topping with a smooth chocolate filling, baked until the edges turn light golden. The recipe uses a double-layer oat mixture—one pressed into the pan, one scattered on top—which gives you both structure and texture. They come together in under an hour and store well for several days.

Recipe Details

• Prep Time: 15 minutes
• Cook Time: 22 minutes
• Total Time: 37 minutes
• Servings: 16 squares

Ingredients

Base and topping

• ½ cup (120 g) margarine, softened
• 1 cup (240 g) brown sugar
• 1 egg
• 1 teaspoon vanilla
• 1 ¼ cup (300 g) all-purpose flour
• 1 ½ cup (350 g) rolled oats
• ½ teaspoon baking soda
• ½ teaspoon salt

Filling

• ⅔ cup (160 ml) sweetened condensed milk
• 1 cup (240 g) chocolate chips
• 2 tablespoons hard margarine
• 1 teaspoon vanilla
• ¼ teaspoon salt

Instructions

Base and topping

1. Cream together the margarine and brown sugar until light and fluffy.
2. Beat in egg and vanilla.
3. In a mixing bowl, blend together the flour, oats, baking soda and salt.
4. Mix flour mixture into creamed mixture, using a wooden spoon to start, until crumbly looking.
5. Reserve roughly ⅓ of the mixture in a bowl and set aside.
6. Press remaining mixture into a greased, lined square pan.

Filling

1. In a mixing bowl over a pot of boiling water, heat all filling ingredients until chocolate chips are just melted.
2. Spread chocolate mixture evenly over prepared base, keeping the sides of the pan clean.
3. Take reserved mixture and sprinkle over the top. Note that it will not cover the whole surface.
4. Bake at 350°F (180°C) for 20 to 25 minutes, or just until oatmeal mixture has a light golden colour.
5. Let cool, cut, and serve.

Variations

• Walnut or pecan topping: Chop ½ cup of nuts and mix them into the reserved oat mixture before scattering over the chocolate. This adds crunch and a subtle nuttiness.
• Sea salt finish: Sprinkle a pinch of fleur de sel or coarse sea salt over the chocolate layer just before adding the oat topping. The salt enhances the chocolate depth.
• Deeper chocolate: Use ¾ cup chocolate chips and add 2 tablespoons unsweetened cocoa powder to the filling mixture for a more intense flavor.
• Swirl topping: After spreading the chocolate, drag the back of a fork through the reserved oat mixture in parallel lines for a rustic, marbled appearance.

Tips for Success

• Cream the margarine and brown sugar until the mixture is visibly pale and airy—this usually takes 2 to 3 minutes with an electric mixer. Under-creaming will give you a denser base.
• When melting the chocolate filling, keep the heat gentle and stir frequently. If the water boils too vigorously, condensation will drip into your filling and seize it.
• Don’t worry if the reserved oat topping doesn’t fully cover the chocolate. The gaps allow the chocolate to stay slightly visible and chewy, which is intentional.
• The squares are done when the edges and tops of the oat pieces turn light golden and feel just firm to the touch. Overbaking will dry them out.
• Let them cool completely in the pan before cutting—they’ll firm up as they cool and cut cleanly. Warm squares will crumble.

Storage and Reheating

To serve chilled squares, let them sit at room temperature for 10 minutes so the chocolate softens slightly and tastes less waxy. If you prefer them warm, place a single square on a microwave-safe plate and heat for 15 to 20 seconds.

FAQ

Can I use butter instead of margarine?

Yes. Use the same amount of softened butter for the base and topping, and the same amount of cold butter for the filling. Butter will give the squares a richer, slightly less uniform crumb than margarine.

Why is my filling grainy or separated?

This usually happens if the filling gets too hot or steam condenses into the mixture. Keep the water at a gentle boil, stir often, and make sure the bottom of your mixing bowl isn’t touching the water. If it happens, reheat gently over the water bath while stirring until smooth.

Can I make these ahead?

Yes. You can prepare and bake them up to 2 days before serving. Store them in an airtight container at room temperature, and refresh them by warming a single square in the microwave for 15 seconds just before eating.

What if I don’t have rolled oats?