- 1 cup milk
- 1 tablespoon white vinegar
- 1 cup all-purpose flour
- 1 cup whole wheat flour
- 3/4 cup white sugar
- 1 tablespoon baking powder
- 1/2 teaspoon salt
- 2 eggs, lightly beaten
- 1/2 cup canola oil
- 2 cups frozen blueberries
- Combine milk and vinegar in a small bowl; allow to rest for 5 minutes.
- Preheat oven to 400 degrees F (200 degrees C). Lightly grease muffin cups or line with paper liners.
- Mix all-purpose flour, whole wheat flour, sugar, baking powder, and salt in a large bowl; make a well in the center. Pour eggs, milk mixture, and canola oil into well; stir until batter is just combined. Fold in blueberries and pour batter into prepared muffin cups.
- Bake in the preheated oven until a toothpick inserted into the center comes out clean, 20 to 25 minutes. Cool in the pans for 10 minutes before removing to cool slightly on a wire rack.