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An overhead shot of squares of strawberry crumble cake. One square has a strawberry on top that has been cut in half

Strawberry Crumble Cake

A soft and tender yellow cake swirled with jam and sliced strawberries and an oatmeal crumble topping.
Course Dessert, Snack
Cuisine American
Prep Time 10 minutes
Cook Time 45 minutes
Total Time 55 minutes
Servings 16 slices
Calories 157kcal
Author Ella


  • 8" square pan



  • ¾ cup light brown sugar
  • ¾ cup sour cream room temperature
  • 1 teaspoon vanilla extract
  • ½ teaspoon kosher salt
  • 1 ¼ cup all-purpose flour
  • 1 ½ teaspoon baking powder
  • ¼ teaspoon baking soda
  • 1 ¼ cup strawberries thinly sliced
  • 2 eggs room temperature
  • ½ cup butter melted
  • ¼ cup strawberry jam

Crumble Topping

  • ¼ cup oats
  • ¼ cup light brown sugar
  • ½ teaspoon cinnamon
  • ¼ teaspoon kosher salt
  • 3 tablespoon butter room temperature
  • cup all-purpose flour


  • Preheat oven to 350°F/175°C. Grease and line an 8-inch square pan.
  • Add all of your topping ingredients to a medium bowl. Mix everything together using your fingers until it looks like coarse sand. Set aside.
  • Whisk your sugar with your eggs until they become foamy with a few bubbles.
  • Add in the sour cream, melted butter, vanilla and salt and whisk until combined.
  • Pour in your flour, baking powder and baking soda. Use a rubber spatula to fold everything together until you no longer see any streaks of flour.
  • Pour all of the batter into your pan. Dollop your jam over and use a butter knife to swirl it around.
  • Scatter our thinly sliced strawberries on top.
  • Pour over your crumble topping evenly.
  • Bake for 45-50 minutes. A toothpick inserted should come out clean or with just a few crumbs.


  • If you don't have kosher salt, half the amounts listed for fine sea salt (i.e. 1 teaspoon kosher salt = ½ teaspoon fine sea salt).
  • Make sure your strawberries are very thinly sliced or they won't bake well in the cake. 
  • If you're in the UK, please be aware that US cup sizes are different to UK cup sizes. 
  • The crumble topping uses rolled oats


Calories: 157kcal | Carbohydrates: 29g | Protein: 3g | Fat: 3g | Saturated Fat: 2g | Trans Fat: 1g | Cholesterol: 27mg | Sodium: 199mg | Potassium: 95mg | Fiber: 1g | Sugar: 17g | Vitamin A: 115IU | Vitamin C: 7mg | Calcium: 66mg | Iron: 1mg