Prepare to bake. Preheat the oven to 350 degrees F. Line an 8x8 baking dish or prepared baking pan with parchment paper and set aside.
Blend the cottage cheese. Add the cottage cheese to a food processor or high-speed blender and blend until smooth.
Mix the batter. Transfer the blended cottage cheese to a large mixing bowl. Add the peanut butter, almond flour, coconut sugar, vanilla protein powder if using, vanilla extract, and a pinch of salt. Mix until fully combined. Fold in the chocolate chips. The batter will be very thick.
Bake. Scoop the batter into the prepared baking pan and press it down evenly with the back of a spatula. Bake for 20-25 minutes for softer blondies, or closer to 30 minutes if you want them more firm and cakey.
Cool and slice. Leave the blondies in the pan to cool completely in the fridge before slicing into squares. This helps them set (they're very gooey!)
