Classic Chocolate Mug Cake5 mins prepServes 1A simple recipe for a classic chocolate mug cake, made with chocolate, butter, egg, and cake flour, baked in an oven.US standardMetric-1 servings+SharePrintWhat you need¾ oz unsalted butter1 egg2 oz chocolate1 ⅛ oz cake flourCheckout experienceCheckout experienceInstacartCheckout experienceInstacartShop ingredientsInstructionsMelt the chocolate in butter and then beat in an egg until fully mixed. Sift cake flour into the mixture and stir until combined. Bake at 350F for 25mins.View original recipe