This Classic Crumb Cake is exactly the kind of bake I reach for when I want something comforting that still looks like effort. It’s a tender, sour-cream–moist sheet cake topped with a generous, crackly cinnamon crumb. The crumbs give it great texture; the cake beneath stays soft and slightly dense—perfect with coffee.

I like to make it in a 13×9-inch pan so there’s enough to share. It travels well to potlucks and keeps its shape when sliced. The recipe is straightforward and forgiving if you follow the mixing order, and the crumb topping is supposed to be clumpy—don’t try to make it fine like streusel.

Below you’ll find a clear ingredients list with quick notes, the step-by-step directions exactly as tested, and practical tips for swaps, equipment, and avoiding the small mistakes that ruin crumb structure. No fluff—just what works.

Ingredients at a Glance

butter, for greasing the pan — Key for an easy release; room-temperature rubbed across the pan or a solid swipe of stick butter works fine.
2½ cups all purpose flour — For the cake batter; measure by spooning into the cup and leveling for accuracy.
1 teaspoon baking soda — Leavening for lift; make sure it’s fresh.
1 teaspoon baking powder — Works with baking soda to give structure and a light crumb.
½ teaspoon salt — Balances the sweetness and heightens flavor.
10 tablespoons (1¼ sticks) unsalted butter, at room temperature — Creamed with sugar to create the cake’s tender crumb and richness.
1 cup granulated white sugar — Sweetens the cake and helps aeration when creamed with butter.
3 large eggs — Provide structure and moisture; add one at a time as instructed.
1 teaspoon vanilla extract — Simple aromatics that lift the whole cake.
1¼ cups sour cream — The reason this cake stays moist and not dry; do not substitute with milk unless you adjust other elements.
3 cups all purpose flour — For the crumb topping; more flour than the batter creates big, crunchy clumps.
1 cup packed light brown sugar — Adds moisture and caramel notes to the crumb.
1 tablespoon ground cinnamon — The signature spice for the topping; adjust to taste but don’t omit.
1½ teaspoons coarse salt (I used Kosher) — Enhances the cinnamon-brown sugar mix; coarse salt gives a pleasant bite.
1¾ cups (3½ sticks) unsalted butter, at room temperature — Cut into the dry topping to form large moist clumps; keep it cool enough to clump, not melt.

Classic Crumb Cake Made Stepwise

Preheat the oven to 350°F (175°C). Generously butter a 13×9-inch baking pan with the butter marked “butter, for greasing the pan.”
In a medium bowl, whisk together 2½ cups all-purpose flour, 1 teaspoon baking soda, 1 teaspoon baking powder, and ½ teaspoon salt. Set this dry mixture aside.
In a large bowl or the bowl of a stand mixer, beat 10 tablespoons (1¼ sticks) unsalted butter (room temperature) and 1 cup granulated sugar until light and fluffy, about 3–4 minutes, scraping the sides of the bowl as needed.
Add the 3 large eggs to the butter-sugar mixture one at a time, beating briefly after each addition until incorporated. Mix in 1 teaspoon vanilla extract.
Add the reserved flour mixture to the wet ingredients, then add 1¼ cups sour cream. Beat just until combined and no large streaks of flour remain; do not overmix.
Scrape the batter into the prepared 13×9-inch pan and spread into an even layer with a rubber spatula.
Make the crumb topping: in a medium bowl, whisk together 3 cups all-purpose flour, 1 cup packed light brown sugar, 1 tablespoon ground cinnamon, and 1½ teaspoons coarse salt. Cut in 1¾ cups (3½ sticks) unsalted butter (room temperature) with a pastry blender, two forks, or a food processor (pulsing) until large, moist clumps form.
Sprinkle the crumb topping evenly over the batter, covering the surface.
Bake in the preheated oven until the top is golden brown and a toothpick inserted into the center comes out clean, 40–50 minutes. The center should feel slightly firm, not soft and soggy.
Remove the pan from the oven and transfer to a wire rack. Cool until warm or at room temperature, then slice and serve.

Why It’s My Go-To

This cake hits the sweet spot: straightforward technique, pantry-friendly ingredients, and a reliably indulgent result. The batter is simple to mix—cream butter and sugar, add eggs, dry ingredients, and sour cream—so you spend less time fussing and more time enjoying the final cake. The crumb topping is intentionally large and clumpy; it creates texture contrast and caramelized pockets as it bakes.

I also love that it scales for guests. A 13×9 pan makes commonsense portions for brunch or a crowd, and slices freeze well. For busy mornings or impromptu company, this is a make-ahead, slice-and-serve kind of recipe that keeps its charm.

Vegan & Vegetarian Swaps

Vegetarian

No changes needed—the recipe is vegetarian as written.

Vegan options

Butter: Use a firm, high-fat vegan butter in place of the unsalted butter for both batter and crumb. Refrigerate slightly before cutting into the dry topping so it forms clumps.
Eggs: Replace each egg with a flax “egg” (1 tablespoon ground flax + 3 tablespoons water, chilled 5–10 minutes). The texture will be slightly denser; test a small batch first.
Sour cream: Swap with an equal amount of unsweetened vegan yogurt or a thick plant-based sour cream for similar tang and moisture.

Hardware & Gadgets

Keep this minimal. The recipe works with common tools you already have:

13×9-inch baking pan — Essential for the right thickness and bake time.
Stand mixer or hand mixer — Makes creaming butter and sugar effortless, but you can do it by hand if needed.
Pastry blender, two forks, or food processor — For cutting butter into the crumb topping; a processor is fastest, pastry blender gives best control.
Rubber spatula and whisk — For folding and mixing the batter without overworking.
Wire rack and toothpick — For testing doneness and cooling.

Errors to Dodge

Overmixing the batter: Mix until the flour streaks disappear. Overbeating develops gluten and yields a tough cake.
Warm butter in the topping: If the butter is too soft, the crumb will smear instead of clump. Use room-temperature butter but chill it a little if your kitchen is hot.
Underestimating bake time: The crumb slows bake heat slightly. Test with a toothpick in the center and make sure the cake feels set—40–50 minutes is the range, but ovens vary.
Covering the crumbs while hot: Don’t wrap or cover the pan while the crumbs are hot; condensation will make the topping soggy.

Holiday & Seasonal Touches

Small seasonal tweaks add interest without changing technique. In fall, fold ½–1 cup finely chopped apples into the batter and reduce sour cream by 2 tablespoons. For winter, add ¼ teaspoon freshly ground nutmeg to the crumb mixture and sprinkle a few chopped toasted pecans over the top before baking. In spring, stir a tablespoon of lemon zest into the batter and omit any citrus-conflicting spices.

For the holidays, consider a thin glaze: 1 cup powdered sugar whisked with 1–2 tablespoons milk or cream and a teaspoon of vanilla, drizzled once the cake is cool. Keep it light so the crumb remains the star.

Testing Timeline

Here’s a quick timeline to plan your bake:

0–15 minutes: Preheat oven, grease pan, measure dry ingredients, and bring butter and sour cream to room temperature.
15–30 minutes: Cream butter and sugar, add eggs and vanilla, mix batter, and spread in pan.
30–40 minutes: Make crumb topping, cut butter in, and top the batter.
40–50 minutes baking: Bake until golden and a toothpick comes out clean from the center.
After baking: Cool on a wire rack until warm or room temperature before slicing (30–60 minutes for best crumb integrity).

Leftovers & Meal Prep

Slices keep at room temperature, wrapped tightly, for up to 2 days. For longer storage, refrigerate in an airtight container for up to 5 days. Reheat briefly in a low oven (300°F) for 5–7 minutes to refresh the crumbs and soften the cake.

To freeze: wrap individual slices in plastic wrap, then foil, and freeze up to 3 months. Thaw overnight in the fridge and warm in the oven for best texture.

Questions People Ask

Can I make this in two 9-inch rounds? You could but the depth will change and bake time will vary. This recipe is optimized for a 13×9-inch pan.
Why is my crumb topping greasy? If the butter was too soft while cutting into the flour, it will smear and release oil. Chill the mixed crumbs briefly or use a pastry cutter to get clumps.
Can I use plain yogurt instead of sour cream? Yes—use full-fat Greek yogurt for similar tang and moisture. Texture may be slightly different.
Is the cake okay slightly warm? Yes. It’s delicious warm, but the topping firms up as it cools; slicing too soon can cause crumbs to shift.

Let’s Eat

Cut generous squares, serve with strong coffee or tea, and let the crumb do the talking. This Classic Crumb Cake is a crowd-pleaser: rustic-looking, forgiving to make, and built to travel. Try it once and you’ll understand why it earns a regular spot in my baking rotation. If you make it, tell me how you topped it—pecans, a lemon zest twist, or classic cinnamon. I love hearing what readers do to make it their own.

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Classic Crumb Cake

A tender sour cream cake base topped with a buttery cinnamon crumb topping for a classic crumb cake.

Prep Time25

Cook Time40

Total Time1 5

Course: Dessert

Servings: 12 servings

Ingredients

butter for greasing the pan
2 1/2 cupsall purpose flour
1 teaspoonbaking soda
1 teaspoonbaking powder
1/2 teaspoonsalt
10 tablespoons 1 1/4 sticksunsalted butter, at room temperature
1 cupgranulated white sugar
3 largeeggs
1 teaspoonvanilla extract
1 1/4 cupssour cream
3 cupsall purpose flour
1 cuppacked light brown sugar
1 tablespoonground cinnamon
1 1/2 teaspoonscoarse salt I used Kosher
1 3/4 cups 3 1/2 sticksunsalted butter, at room temperature

Instructions

Preheat the oven to 350°F (175°C). Generously butter a 13x9-inch baking pan with the butter marked "butter, for greasing the pan."
In a medium bowl, whisk together 2½ cups all-purpose flour, 1 teaspoon baking soda, 1 teaspoon baking powder, and ½ teaspoon salt. Set this dry mixture aside.
In a large bowl or the bowl of a stand mixer, beat 10 tablespoons (1¼ sticks) unsalted butter (room temperature) and 1 cup granulated sugar until light and fluffy, about 3–4 minutes, scraping the sides of the bowl as needed.
Add the 3 large eggs to the butter-sugar mixture one at a time, beating briefly after each addition until incorporated. Mix in 1 teaspoon vanilla extract.
Add the reserved flour mixture to the wet ingredients, then add 1¼ cups sour cream. Beat just until combined and no large streaks of flour remain; do not overmix.
Scrape the batter into the prepared 13x9-inch pan and spread into an even layer with a rubber spatula.
Make the crumb topping: in a medium bowl, whisk together 3 cups all-purpose flour, 1 cup packed light brown sugar, 1 tablespoon ground cinnamon, and 1½ teaspoons coarse salt. Cut in 1¾ cups (3½ sticks) unsalted butter (room temperature) with a pastry blender, two forks, or a food processor (pulsing) until large, moist clumps form.
Sprinkle the crumb topping evenly over the batter, covering the surface.
Bake in the preheated oven until the top is golden brown and a toothpick inserted into the center comes out clean, 40–50 minutes. The center should feel slightly firm, not soft and soggy.
Remove the pan from the oven and transfer to a wire rack. Cool until warm or at room temperature, then slice and serve.