Step 1: Prepare the Oven

Preheat your oven to 350°F. Grease or line a 9x9-inch baking pan with parchment paper.

Step 2: Mix the Wet Ingredients

In a large mixing bowl, whisk together the avocado oil and maple syrup until combined.

Add the eggs one at a time, whisking after each addition. Stir in the mashed banana, applesauce, and vanilla extract.

Step 3: Mix the Dry Ingredients

In a separate bowl, whisk together the all-purpose flour, whole wheat flour, baking soda, salt, cinnamon, and ground flaxseed.

Step 4: Make the Batter

Add the dry ingredients to the wet ingredients and stir gently until just combined. Be careful not to overmix.

Step 5: Bake

Pour the batter into the prepared baking pan and spread evenly.

Bake for 40 to 45 minutes, or until a toothpick inserted into the center comes out clean.

Allow the cake to cool in the pan for 15 minutes before transferring to a wire rack.

Step 6: Add the Chocolate Drizzle

Melt the chocolate in a microwave-safe bowl using 30-second intervals, stirring between each interval until smooth.

Drizzle over the cooled cake and allow the chocolate to set before slicing.