I've never tried a confetti cake before. I tried it as cupcakes today, just my normal yellow cake batter, unaltered, with sprinkles added. Some sunk to the bottom as expected but they suspended ok overall. It's a thick-ish batter with a lot of corn starch. But the bottoms came out liquid and underbaked. I tried to save them to the point of burning the tops to a muffin crisp. Nothing helps... It stays undercooked... The candy saps all the heat. Chocolate is one thing but I've never worked with a candy additive like sprinkles in a batter. How does one offset the sprinkles and get the bottom to actually bake solid?