Preheat oven to 400 F.
Add all ingredients except chocolate chips to a bowl. Mix by hand, or with a hand mixer or standing mixer.
Mix in chocolate chips with a spoon.
Grease a 8x8 baking dish or line with parchment paper. Pour the mixture in, making sure it fills in evenly and is smooth.
Bake for 18-20 minutes or until a toothpick comes out clean.
