Old Fashioned Coffee Cake

Old Fashioned Coffee Cake is a tender, crumb-topped butter cake that sits between breakfast and dessert. The cinnamon-sugar topping stays crunchy while the cake underneath stays moist, and a sour cream base keeps it soft for days.

Ingredients for Old Fashioned Coffee Cake

All-purpose flour builds structure and keeps the crumb tender. Butter creates richness and a fine, even crumb. Sugar sweetens and helps the cake brown. Eggs bind everything and add lift. Sour cream keeps the cake moist and adds tang that balances the sweetness. Baking powder and baking soda work together to rise the cake without making it tough. Vanilla extract brings depth. Salt enhances all the flavors. The cinnamon topping mixture adds warmth and texture, while brown sugar in the topping gives it a molasses note that regular sugar cannot.

Why This Old Fashioned Coffee Cake Works

Sour cream is the secret to this cake’s texture. It adds moisture and fat, which keep the crumb tender even after baking, and its acidity reacts with baking soda to create lift without relying only on baking powder. The result is a cake that stays soft for several days instead of drying out by day two.

The topping mixture gets stirred into the batter in two additions: half goes on the bottom of the pan, then half the batter goes in, then the rest of the topping, then the rest of the batter. This layering means every bite has cinnamon-sugar running through it, not just on top. The topping stays crunchy because it does not fully hydrate during baking.

Room-temperature butter and eggs mix into a light, fluffy base that traps air. This base is what gives the cake its tender crumb. Cold butter will not incorporate smoothly, and cold eggs will not mix into the butter evenly, leaving you with a dense cake instead.

Mistakes To Avoid

Using cold butter and eggs will keep them from mixing into a smooth, fluffy base. The batter will look grainy and broken instead of light and pale, and the finished cake will be dense and heavy instead of tender and airy.

Overmixing the batter once flour is added overdevelops gluten and makes the cake tough and rubbery. Stop as soon as you see no streaks of flour. A few lumps are fine and will smooth out during baking.

Packing flour into the measuring cup or not leveling it off adds too much flour to the batter. The cake will be dry, crumbly, and tough because there is not enough fat to keep the crumb tender.

Opening the oven door before the cake has baked for at least 25 minutes causes it to sink in the middle. The sudden temperature drop makes the cake collapse before the structure has set, leaving a crater down the center.

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Ingredients

• 1 3/4 cups (220 grams) all-purpose flour
• 1 teaspoon baking powder
• 1/2 teaspoon baking soda
• 1/4 teaspoon salt
• 1/2 cup (115 grams) unsalted butter, room temperature
• 3/4 cup (150 grams) granulated sugar
• 1 large egg, room temperature
• 1 teaspoon vanilla extract
• 1/2 cup sour cream, room temperature
• 1/3 cup (70 grams) packed brown sugar
• 2 tablespoons all-purpose flour
• 1 1/2 teaspoons ground cinnamon
• 2 tablespoons unsalted butter, cold

Step-by-step Instructions

1. Heat your oven to 350°F (175°C). Grease the 9×9-inch pan with butter or nonstick spray.
2. In a small bowl, whisk together 1 3/4 cups flour, baking powder, baking soda, and salt. Set aside.
3. In a large bowl, beat 1/2 cup room-temperature butter and 3/4 cup granulated sugar with an electric mixer on medium speed for 2 to 3 minutes until light and fluffy, scraping down the bowl halfway through.
4. Add the egg and vanilla extract to the butter mixture and beat on medium speed for 1 minute until combined.
5. On low speed, alternate adding the flour mixture and sour cream in three additions, starting and ending with flour. Mix until no flour streaks remain, then stop. Do not overmix.
6. Make the topping: in a small bowl, stir together 1/3 cup brown sugar, 2 tablespoons flour, and cinnamon. Cut 2 tablespoons cold butter into small pieces and rub it into the mixture with your fingertips until it looks like damp sand. Do not use room-temperature butter here.
7. Spread half the topping mixture into the bottom of the prepared pan.
8. Spread half the batter over the topping.
9. Sprinkle the remaining topping over the batter.
10. Spread the remaining batter over the topping, smoothing it gently.
11. Bake on the middle rack for 32 to 37 minutes until a toothpick inserted in the center comes out with a few moist crumbs and the top is golden brown. An instant-read thermometer should read 200°F (93°C) at the center.
12. Let the cake cool in the pan for 10 minutes, then turn it out onto a wire rack or serve it directly from the pan once it has cooled to warm.