Blueberry Chocolate Chip Muffins

Ingredients (15)

• BLUEBERRY CHOCOLATE CHIP MUFFINS:
• 1/2 cup butter (melted)
• 1/2 cups mini semi-sweet chocolate chips
• 3/4 cup sugar
• 1 egg lightly beaten
• 1 cup sour milk (to make sour milk add 1 tablespoon lemon juice to 1 cup measure and top off with milk, let sit for about 10 - 15 minutes)
• 1 teaspoon vanilla
• 2 cups flour
• 1 teaspoon baking soda
• 3/4 cup fresh or frozen blueberries (thawed)
• STREUSEL TOPPING:
• 1 cup flour
• 2/3 cup sugar
• 1/2 cup butter (melted)
• 1/3 cup mini chocolate chips