Banana Chocolate Chip Sheet Cake with Sweet Maple Icing

INGREDIENTS

• 1 box yellow cake mix
• 1 large egg
• 1 stick/1/2 cup unsalted butter, softened
• 3 large over ripe bananas, mashed
• 1 1/2 cups semi-sweet chocolate chips
• 6 cups powdered sugar
• 1/2 cup heavy cream
• 1/4 cup pure maple syrup
• 1/4 cup white sprinkles