Allow cream cheese to warm to room temperature. Whisk frosting ingredients until smooth. Set aside.
In a food processor, combine chickpeas and peanut butter until smooth. Add in remaining ingredients until smooth.
Spray an 8x8 inch baking pan with non-stick cooking spray (I like the coconut oil kind). Pour batter into pan and smooth out until even. Bake at 325 degrees for 35-40 minutes or until a toothpick inserted in the center comes out clean.
Allow to cool before frosting, then cut into 16 pieces and serve. Store in refrigerator.