I'm no math whiz but I believe I've just solved an equation that much of the cupcake world swears by: vanilla + sprinkles = birthday. Long before I applied for membership and cracked the code, cupcake folk deemed the candle (which I've always considered to be the quintessential birthday symbol) completely unnecessary in the annual celebration.
Case in point: these birthday vanilla cupcake studs from Inedible Jewelry. Available with either surgical steel or sterling silver posts, the $18 cupcake earrings are outfitted with vanilla frosting, multicolored sprinkles, and a cherry (the variable, I guess). See?