Combine all ingredients in a blender except for the chocolate chunks.
Add chocolate chunks and just use a spoon to stir them.
Pour batter into a coconut oil sprayed muffin tin (or use muffin liners). Bake for 20 minutes at 350° F (180°C).
Remove from oven, let cool for 30 minutes and store in the refrigerator for up to 6 days.