Preheat the oven to 180 Deg C.
Line your baking tray with parchment paper or grease it with some butter. In a bowl sift in the flour, cocoa powder, and salt.
1 ¼ Cup Whole Wheat Flour, 2 tablespoon Cocoa Powder, 1 teaspoon Salt
Once the chocolate and butter mixture is cooled to room temperature, add eggs one at a time and beat it into the mixture.
4 eggs
Once all 4 eggs are added, add in the vanilla extract and kale puree and mix it.
2 teaspoon pure vanilla extract
Now add the sugar and mix it gently.
1 ½ cup Dark Brown Sugar
Add in the flour mixture and gently fold it in. Do not overmix.
Pour the mixture in the baking tray.
Bake in a preheated oven for 35-40 minutes or until the toothpick comes out clean.