Preparation Steps

• Preheat oven to 350°F (175°C). Line a metal 9x13 inch pan with foil and spray well with cooking spray.
• In a large bowl, cream together the softened butter and packed brown sugar until crumbly.
• Mix in the eggs and vanilla extract until smooth.
• Stir in the salt, baking powder, and then the flour until just combined. Do not overmix.
• Gently fold in the M&Ms and sprinkles.
• Spread the mixture evenly into the prepared pan. The batter will be quite wet; spraying your hands with cooking spray can help smooth it out for an even layer.
• Bake for 22-25 minutes, or until the edges are golden brown. It's best to err on the side of underbaked, as the cheesecakes will continue to set as they cool.
• Let cool completely in the pan before slicing into bars.