DIY Double Decker Brownie-Cookie Slice

Hi Deerest Friends,

You have to give it to the Americans. They have the uncanny ability of taking two yummy foods and creating some sort of crazy-delicious hybrid. Usually making me a cookie or giving me some brownie would be more than enough to make me smile but when I heard about this recipe, I couldn’t resist giving it a try! Part fudgy brownie, part moist choc-chip cookie; today’s tutorial is the completely delicious, Double Decker Brownie-Cookie Slice. Now making two separate recipes at the same time and having to combine them together may sound a bit tricky, but stick with me it’s easy as… well… cake!

So Let’s Get Started

You Will Need
-A 30x20cm slice pan
-Baking paper
-2 Saucepans (medium saucepan)
-1 Medium-sized bowl

For the Brownie Layer:
-180gm of Salted Butter
-¾ cup Unsweetened Good-quality Cocoa Powder
-1 ½ cups White Sugar
-2 large Eggs
-½ teaspoon Vanilla Extract
-¾ cup All-purpose (Plain) Flour

For the Cookie Layer:
-180gm of Salted Butter
-1 cup, packed Brown Sugar
-1 ½ cups All-purpose (Plain) Flour
-½ teaspoon Baking Soda
-1 teaspoon Vanilla Extract
-1 cup Milk (Semisweet) Chocolate Chips

Preheat oven to 170°C and lightly grease a 20×30cm baking pan and cover the inside with baking paper.

Step 1

Now to begin the cookie layer, put butter in a medium saucepan and melt over low/medium heat. Once all the butter is melted, take the pan off the heat and whisk in brown sugar until no lumps remain. Set aside to cool while you proceed to start the brownie layer.

Step 2

To begin the brownie layer, put the butter in medium saucepan and melt over low/medium heat, stirring occasionally. Once the butter is melted, take the pan off the heat and sift in cocoa powder. Mix until smooth and then add sugar and whisk until blended.

Step 3

Step 4

Add one egg at a time to the brownie mixture and whisk after each addition. Also add in vanilla. Sift flour over the chocolate mixture and stir with a rubber spatula until blended. Be careful not to over-mix as you may make the mixture too tough.

Step 5

Now back to the cookie mixture. In a small bowl mix together sifted flour and baking soda.

Step 6

Add the egg and vanilla to the cooled butter mixture and whisk until blended. Then pour the flour mixture into the butter mixture and stir until blended. Add chocolate chips to cookie mixture and mix well to distribute them evenly.

Step 7

Pour the brownie mixture into the base of the prepared pan. Use a spatula to spread evenly. Now drop the cookie dough over the brownie batter in large scoopfuls and spread evenly with a rubber spatula. Be careful to evenly drop batter across the brownie layer because it gets difficult to spread.

Step 8

Now put in the preheated oven and bake for 30-40 minutes, turning your pan every 10 minutes. When a wooden toothpick inserted into the slice comes out with gooey clumps of brownie sticking to it, turn your oven off and take the pan out. Allow time to cool before cutting.

And You’re Done!

DIY Double Decker Brownie-Cookie Slice

This is so delicious and has automatically become one of my favourites! I will definitely be repeating this recipe again and again. This is a really unique, quirky idea that would be a great contribution to any party and would also make a really great gift.

If you liked this DIY tutorial comment below and if you have any other DIY ideas you’d like me to attempt let me know 🙂


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