Crumb cake

Intensity breakdown: Simple mixing, one bowl for crumbs, one for batter. No stand mixer required (hand mixer or whisk works). Watch for even crumb distribution.

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Ingredients

For the Crumb Topping (the “crumb”)

• 2 ½ cups (315g) all-purpose flour

• 1 cup (200g) granulated sugar

• ½ cup (100g) light brown sugar, packed

• 1 tablespoon ground cinnamon

• 1 teaspoon kosher salt

• 1 cup (226g) unsalted butter, melted and slightly cooled

For the Cake

• 2 ½ cups (315g) all-purpose flour

• 1 teaspoon baking powder

• ½ teaspoon baking soda

• ½ teaspoon kosher salt

• ½ cup (113g) unsalted butter, softened

• 1 cup (200g) granulated sugar

• 2 large eggs, room temperature

• 1 cup (240g) full-fat sour cream, room temperature

• 2 teaspoons vanilla extract

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Instructions

1. Prepare the Crumb Topping (10 min • low intensity)

In a medium bowl, whisk together the flour, granulated sugar, brown sugar, cinnamon, and salt. Pour the melted butter over the dry ingredients. Use a fork or your fingertips to mix until large, pea-sized and fine crumbs form. You want a mix of textures—some clumps, some sandy bits. Set aside at room temperature. (Do not refrigerate, or the crumbs will harden.)

2. Preheat and Prepare the Pan (5 min • low intensity)

Position a rack in the center of your oven. Preheat to 350°F (175°C). Grease a 9×13-inch baking pan with butter or nonstick spray. Line the bottom with parchment paper for easy removal (optional but helpful).

3. Make the Cake Batter (15 min • medium intensity – mixing attention)

• In a separate bowl, whisk together the flour, baking powder, baking soda, and salt. Set aside.

• In a large mixing bowl, beat the softened butter and granulated sugar with an electric mixer (hand or stand) on medium speed until light and fluffy, about 2 minutes.

• Add the eggs one at a time, beating well after each addition. Scrape down the sides of the bowl.

• Reduce speed to low. Add half of the dry ingredients, mixing just until combined. Add the sour cream and vanilla, mixing until incorporated. Finally, add the remaining dry ingredients and mix until just combined. Do not overmix.

4. Assemble the Cake (5 min • low intensity)

• Spread the cake batter evenly into the prepared pan using an offset spatula or the back of a spoon. The batter will be thick.

• Sprinkle the crumb topping generously over the batter. Use your hands to distribute it evenly, covering every bit of batter. Gently press the crumbs down so they adhere.

5. Bake (45–50 min • passive intensity – watch for doneness)

• Bake for 45–50 minutes, rotating the pan halfway through. The cake is done when a toothpick inserted into the center comes out clean or with a few moist crumbs (not wet batter), and the top is golden brown.

• Pro tip: If the crumbs brown too quickly (after 30 minutes), loosely tent the pan with aluminum foil for the remaining bake time.

6. Cool and Serve (30 min • low intensity)

Transfer the pan to a wire rack. Let the cake cool in the pan for at least 30 minutes before slicing. For clean slices, cool completely (about 1 hour). Serve warm or at room temperature.

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Chef’s Notes & Variations

• Make ahead: The crumb topping can be made 3 days in advance and stored in an airtight container in the refrigerator. Bring to room temperature before using.

• Storage: Keep covered at room temperature for up to 3 days. Refrigerating will dry it out. For longer storage, freeze unfrosted slices for up to 2 months.

• Flavor twist: Add 1 teaspoon of almond extract to the cake batter, or fold in ¾ cup of fresh blueberries or chopped pecans.

• Gluten-free: Substitute a 1:1 gluten-free flour blend (with xanthan gum). Texture will be slightly more delicate.

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Nutritional Information

Per serving (1 slice, based on 12 slices)

*Percent Daily Values based on a 2,000-calorie diet. Your daily values may be higher or lower depending on your energy needs.*

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Why This Recipe Works (The Food Science)

• Reverse-creaming is not used here, but sour cream is key. The acidity in sour cream tenderizes gluten, while its fat content adds moisture. This prevents the “dry cake with wet crumbs” disaster.

• Melted butter in the crumb creates a sandier, clumpier texture than cold butter. As the cake bakes, that butter melts into the batter below, forming a crackly, caramelized crust between the layers.

• Room temperature ingredients ensure the batter emulsifies properly, trapping air for a tender rise.

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Final Notes from the Kitchen

This crumb cake is best enjoyed the day it’s made—but leftovers (if they last) are excellent toasted briefly under a broiler to re-crisp the crumbs. Serve it on a Sunday morning with strong black coffee, or dress it up with a light dusting of powdered sugar and a handful of fresh berries for dessert.