Step 1

Line an 8x8 inch square metal pan with parchment paper and set aside. Preheat the oven to 350℉. Mash the bananas and set aside. Melt the butter and as it cools, prep the rest of your ingredients.

Step 2

In a large bowl, add melted butter, brown sugar, and white sugar. Whisk until smooth.

Step 3

Whisk in sour cream, bananas, egg, egg yolk, and vanilla. There may be chunks because of the banana, that is ok.

Step 4

Add in the flour, cinnamon, baking soda, cornstarch, and salt. Using a spatula, gently fold until a soft batter forms.

Step 5

Add in the pecans and toffee and mix in a few times until well incorporated. Don’t overmix!

Step 6

Transfer the batter into your pan and spread. Bake for 35-45 minutes. A toothpick inserted in the middle will come out mostly clean. If it it wet with batter, the squares are not ready yet, so continue baking.

Step 7

When ready, remove from the oven, cool, and enjoy!