Triple Berry Muffins

2 cups all-purpose flour
3/4 cup sugar
2 1/2 teaspoons baking powder
1/4 teaspoon baking soda
1/4 teaspoon salt
1 cup milk
1/2 cup vegetable oil
2 large eggs
1/2 cup strawberries (sliced)
1/2 cup blueberries
1/2 cup raspberries

Position a rack in the center of the oven and preheat to 400°F.
Lightly butter twelve 2 1/2-inch muffin cups or place paper muffin cups in the muffin tin.
In a medium bowl, whisk the flour, sugar, baking powder, baking soda and salt to combine and make a well in the center.
In another medium bowl, whisk the milk, oil and eggs.
Mix well and pour into the well.
Stir just until blended.
Fold in the berries.
Spoon equal amounts of the batter into the muffin cups, filling them about three-fourths full.
Bake until a toothpick inserted into the center of a muffin comes out clean, 15 to 20 minutes.
Cool in the pan for 5 minutes.
Remove the muffins and serve warm or cool on a wire rack.