Spring Confetti Bars

Ingredients

1/2 cup butter at room temperature

1/2 cup white sugar

1/4 cup + 1 tablespoon brown sugar

1 large egg at room temperature

1 teaspoon vanilla extract

1 and 1/2 cups white flour

1/2 teaspoon baking soda

1 teaspoon baking powder

1/2 teaspoon cornstarch

1/4 teaspoon salt

1 and 1/4 cups white chocolate chips separated

3 cups miniature marshmallows

3/4 cup Spring M&Ms

3 tablespoons sprinkles Spring colored

Instructions