In a medium sized bowl, combine all the BASE LAYER ingredients. Use a hand mixer to combine.
Pour the mixture into an 8x8 (or comparable size) pan that is lined with parchment. Use a spatula to press tightly and form the crust, then bake at 350 degrees for 9-10 minutes.
While the base layer bakes, stir the TOPPING LAYER ingredients together by hand. This can be done using the same bowl and spatula as before.
Once the base layer has baked, remove from the oven and add the topping layer. Press down gently, and then return to the oven to bake for 15 more minutes.
When baking has finished, allow to cool for 10 minutes before serving.