Moist Crumb Cake
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Moist Crumb Cake

This classic crumb cake is topped with big, fat crumbs!

Sometimes, crumb cakes lean towards dry and you need coffee to help each bite go down. Not so with this cake! Sour cream makes it super moist.

The flavor is spot on, too. It’s buttery and tastes like the winning combination of brown sugar and cinnamon.

Crumb CakeOne of my favorite parts of this cake is the cinnamon sugar swirl. It’s really easy to add – spread half of the batter in the pan, and then top with cinnamon and sugar.

Cinnamon sugar topping

Cover that layer with the second half of the batter.

adding batterCrumb cake would just be cake without the topping. People make crumb topping in many different ways, but my favorite topping is a mixture of melted butter, brown sugar, flour, and rolled oats.

Crumb Cake

Baking Tips

I’ve done extensive testing and I’ve found that you can replace the sour cream with yogurt or Greek yogurt and not notice any difference. So, use whatever you have on hand.

I dust the cake with cinnamon when I’m done because I love the taste and look. Although the cake is quite sweet and doesn’t really need it, it also looks nice with a a dusting of powdered sugar or a simple glaze made of milk and powdered sugar.

This cake lasts about three days in an airtight container. But, you can also freeze it for months or freeze individual slices and bring to room temperature before enjoying.

Other Recipes for People Who Like Crumbs

I love crumbs in so many different desserts! But, my favorites are my crumb cookies and my apple crumble pie!

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Crumb Cake
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4.88 from 8 votes

Crumb Cake

Sometimes crumb cakes lean towards dry - not so with this one! It is super moist from sour cream and tastes of brown sugar and cinnamon.
Course Dessert
Cuisine American
Keyword crumb cake
Prep Time 15 minutes
Cook Time 1 hour 15 minutes
Total Time 1 hour 30 minutes
Servings 12
Calories 528kcal
Author Stef

Ingredients

Cinnamon Sugar Ingredients

  • 1/2 cup granulated sugar
  • 1 tablespoon cinnamon

Cake Ingredients

  • 1 cup unsalted butter room temperature
  • 3/4 cup light brown sugar
  • 1/2 cup granulated sugar
  • 2 large eggs
  • 1 cup full-fat sour cream
  • 1/2 teaspoon vanilla extract
  • 2 cups all-purpose flour
  • 1 teaspoon baking powder
  • 1/8 teaspoon salt

Crumb Ingredients

  • 1/2 cup unsalted butter melted
  • 1 1/4 cups all-purpose flour
  • 6 tablespoons light brown sugar same as 1/4 cup + 2 tablespoons
  • 6 tablespoons rolled oats same as 1/4 cup + 2 tablespoons

Instructions

Cinnamon Sugar Instructions

  • Mix ingredients in a small bowl and set aside.

Cake Instructions

  • Preheat oven to 350 F.
  • Beat butter, brown sugar, and white sugar in a medium-sized mixing bowl until light and fluffy.
  • Beat in eggs one at a time.
  • Beat in sour cream and vanilla.
  • In a separate medium-sized mixing bowl, whisk together flour, baking powder, and salt.
  • Add flour mixture to wet ingredients a little bit at a time until just combined.
  • Spread half of the batter into a greased 8" square cake pan.
  • Spread cinnamon sugar mixture evenly over the poured batter.
  • Top with the remaining batter.

Crumb and Baking Instructions

  • Mix all ingredients in a small bowl until large crumbs form.
  • Top the batter with the crumbs.
  • Bake for 75 minutes or until a toothpick inserted into the center of the cake comes out clean.
  • Optionally, sprinkle with a little more cinnamon and dust with powdered sugar.

Notes

You can substitute yogurt (plain or Greek) for the sour cream if that's what you have on hand.
Adapted from AllRecipes Sour Cream Coffee Cake III.

Nutrition

Nutrition Facts
Crumb Cake
Amount Per Serving
Calories 528 Calories from Fat 252
% Daily Value*
Fat 28g43%
Saturated Fat 17g85%
Cholesterol 98mg33%
Sodium 60mg3%
Potassium 149mg4%
Carbohydrates 65g22%
Fiber 2g8%
Sugar 37g41%
Protein 6g12%
Vitamin A 868IU17%
Vitamin C 1mg1%
Calcium 76mg8%
Iron 2mg11%
* Percent Daily Values are based on a 2000 calorie diet.
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