Moist Supper Cake

Pour boiling Dr. Pepper over oatmeal and something magical happens. The oats bloom into a thick, pudding-like mass, the soda’s vanilla-cherry-almond notes infuse every oat, and you end up with a batter that bakes into one of the most tender cakes in the Southern dessert playbook.

This is an old church-cookbook classic, part of a whole family of oatmeal cakes that use a hot soak to hydrate the oats before creaming. The result is a wet, heavy, nutmeg-spiked crumb that stays moist for days.

The broiled coconut topping is the move. Butter, brown sugar, cream, and coconut go under the broiler on the hot cake until the coconut toasts bronze and the sugar bubbles into a thin caramel crust. Serve warm or the topping won’t pull that same trick twice.

Pro Tips

• Use quick oats as specified. Rolled oats stay too chewy and won’t break down into the batter properly.
• Watch the broiler like a hawk. Coconut goes from golden to burnt in about 20 seconds. Pull at the first hint of deep brown at the edges.
• Sift the dry ingredients properly. Baking soda needs even distribution to rise uniformly. Clumps mean tunnels in the crumb.
• Let the cake rest 10 minutes after broiling before cutting. The topping firms from molten to chewy-caramelized as it cools slightly.

Variations

• Swap Dr. Pepper for Coca-Cola, root beer, or strong black coffee. Each gives a distinct flavor backbone.
• Stir chopped pecans into the broiled topping for extra crunch and a classic Southern twist.
• Add a teaspoon of cinnamon alongside the nutmeg for a spicier, more gingerbread-adjacent profile.