Preheat oven to 350ºF and line a 12-cup muffin tin with paper muffin liners.
Combine all ingredients except berries in a blender. Blend until smooth. You can also whisk all ingredients together in a bowl.
Pour into lined muffin tins, filling them 3/4 full. Sprinkle blueberries over top and press down into muffin batter (fresh berries will have less color flow into the batter).