A New York Crumb Cake Recipe Refined Through Years of Testing

Compiled by the editorial desk with reference to the original recipe and testing notes provided by the author.

A home baker's pursuit of the quintessential New York crumb cake has culminated in a revised recipe that prioritizes a towering crumb topping and a moist, tender base. The baker, who previously shared a version in 2021, found that perfection required further tweaks, leading to a cake with a crumb layer 25% thicker than before and a batter enriched with additional sour cream and a splash of water or milk.

The result is a square that is almost comically top-heavy, reminiscent of the best bakery-case offerings. The baker notes that the cake has been tested extensively, with samples shared among family, school teachers, and friends via group texts, all of whom have provided feedback. Now, the recipe is being shared publicly.

The revised recipe, detailed below, yields a 9-inch cake that serves 12 to 16 people. It calls for a crumb mixture of melted butter, dark brown sugar, granulated sugar, cinnamon, salt, and flour, pressed into the bottom of a bowl before being broken into rubble and sprinkled over the batter. The cake batter itself uses softened butter, sugar, an egg, sour cream, water or milk, vanilla, flour, baking powder, and salt.

Key Adjustments for a Better Crumb

The primary changes from the earlier version include increasing the sour cream to 1/2 cup and adding 2 tablespoons of water or milk to the batter, which contributes to a more tender crumb. The crumb layer, now 25% thicker, is achieved by using 10 tablespoons of melted butter and 1 2/3 cups of flour, creating a substantial topping that contrasts with the delicate cake.

The baking process remains straightforward: the cake is baked at 350°F for 30 to 35 minutes, or until a toothpick inserted just below the crumbs comes out clean. The baker advises checking in several spots to ensure even baking. After cooling to lukewarm, the cake is dusted generously with powdered sugar and cut into squares or wedges.

For those who prefer to plan ahead, the cake keeps in an airtight container at room temperature for 3 to 4 days, though the baker recommends enjoying it within the first two days for optimal freshness.

This recipe is part of a broader baking journey that has included previous posts on eggplant parmesan, banana cream pie, and buttermilk biscuits, among others. The baker also hosts a podcast with J. Kenji Lopez-Alt, where they discuss recipes like buttermilk pancakes.