Preheat the oven to 375 degrees F and grease 10 cups of a standard muffin tin.
Stir together all ingredients in a medium bowl.
Spoon the batter evenly into the muffin cups, using about 1/4 cup batter in each one.
Bake for 20-22 minutes or until a cake tester inserted into the center comes out cleanly. Let rest in the pan for a few minutes, then remove from the pan and let cool on a wire rack.
Notes
Store for up to 5 days in an airtight container in the fridge or in a zip top freezer bag in the freezer for up to 3 months.