Blueberry Muffin Cake | Food Stuff

Ingredients

• 1 1/2 teaspoons baking powder
• 1 pint blueberries
• 1 large egg
• 1 1/2 cups all-purpose flour
• 1 cup plus 2 tablespoons granulated sugar
• 1/2 cup milk
• 1/2 teaspoon table salt
• 6 tablespoons unsalted butter, at room temperature, plus extra for pie plate
• 1 teaspoon vanilla extract