You bake them. Just follow one of these recipes:
Otis Spunkmeyer Blueberry Muffins
1 (15 oz.) can Blueberries in Liquid (rinse lightly and drain)
1 Package White Cake Mix
1 Package of Instant Vanilla Pudding 4 serving size
4 Eggs (beaten)
1/2 C. Vegetable Oil
3/4 C. Milk
1 tsp. Vanilla
Rinse Blueberries lightly and drain well. In mixing bowl beat eggs until light. To the eggs add cake mix, pudding, vegetable oil, vanilla, and milk. Beat until smooth but do not over beat. About two to two and half minutes. Batter will be thick. Carefully fold blueberries into batter with a spoon or spatula. try not to break the berries, they can be very tender.
Fill muffin cups 3/4 full and place in a preheated oven at 350 degrees for 20 - 30 minutes depending on the size of you muffin cups. Test with a tooth pick and taking care not to over bake. Will make about 9 large muffins or 12 - 15 small muffins. Store muffins in a air tight container.
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Blueberry Coffee Cake Muffins
12 tablespoons unsalted butter -- at room temperature
1 1/2 cups sugar
3 extra large eggs -- at room temperature
1 1/2 teaspoons vanilla extract
8 oz. sour cream -- (1cup)
1/4 cup milk
2 1/2 cups all purpose flour
2 teaspoons baking powder
1/2 teaspoon baking soda
1/2 teaspoon kosher salt
2 half pints fresh blueberries -- pick through for stems
Preheat oven to 350ºF. Line muffin tin with liners.
Cream butter and sugar until fluffy about 5 min. Add eggs one at a time then add vanilla, sour cream and milk.
Sift together flour, baking powder, baking soda, and salt and add to butter mixture until mixed. Fold in blueberries with a spatula. Scoop with an ice-cream scoop in prepared muffin tin.
Bake 25 to 30 minutes.
