Preheat oven to 350 degrees F. Line a muffin tin with silicone (or paper) liners.
Place all ingredients, except for the chocolate chips, in a blender. Blend until smooth.
Pour the mixture into the prepared muffin tin, filling each muffin cup almost to the top. Drop 4-5 chocolate chips onto the top of each muffin.
Bake for 18-20 minutes, until a toothpick inserted into the center of a muffin comes out clean. Cool 5 minutes in the pan and then remove to a wire rack to cool completely. (Silicone liners can be removed once muffins are cool.)
