Dessert

Oat Cake with Blackberries and Blueberries Recipe

Name: Oat Cake with Blackberries and Blueberries Recipe
Prep time: 15 min
Cook time: 45 min
Total time: 1 h
Cuisine: American
Ingredients: 1/4 cup Unsalted Butter; 2/3 cup Water; 1 Egg; 1 teaspoon Vanilla Extract; 3/4 cup All-Purpose Flour; 1 cup Quick Cooking Oats; 1/2 teaspoon Baking Powder; 1/2 teaspoon Baking Soda; 3/4 teaspoon Salt; 1/2 teaspoon Ground Cinnamon; 1/4 cup Granulated Sugar; 1/2 cup Brown Sugar; 2 cup Fresh Mixed Berries (Blackberries and Blueberries)

ByEthan Lark December 13, 2025December 13, 2025

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Introduction

This delightful oat cake combines the hearty texture of oats with the sweet and tangy burst of fresh blackberries and blueberries. It’s a perfect treat for breakfast or a cozy afternoon snack, bringing wholesome flavors and fruity freshness together in every bite.

The image shows a white ceramic baking dish filled with a baked dessert. The dessert has a golden brown crust with scattered dark purple and black berries embedded on top, along with a sprinkling of light oat flakes across the surface. The texture of the crust looks slightly rough and crumbly. The baking dish is placed on a yellow cloth that covers a white marbled surface. Next to the dish, there are two empty white plates, each with a fork resting on top, positioned on the yellow cloth. Photo taken with an iphone --ar 4:5 --v 7

Ingredients

1/4 cup Unsalted Butter
3/4 cup All-Purpose Flour
1 cup Quick Cooking Oats
1/2 teaspoon Baking Powder
1/2 teaspoon Baking Soda
2/3 cup Water
3/4 teaspoon Salt
1/2 teaspoon Ground Cinnamon
1/4 cup Granulated Sugar
1/2 cup Brown Sugar
1 Egg
2 cup Fresh Mixed Berries (blackberries and blueberries)
1 teaspoon Vanilla Extract

Instructions

Step 1: Preheat your oven to 350 degrees F (180 degrees C) and grease an 8-inch square baking dish. In a small bowl, combine the quick cooking oats and water and let it stand for about 5 minutes to soften.
Step 2: In a large bowl, cream together the unsalted butter, granulated sugar, and brown sugar using a handheld mixer for about 2 minutes until the mixture is light and fluffy.
Step 3: In another bowl, whisk together the all-purpose flour, ground cinnamon, baking powder, baking soda, and salt until well combined.
Step 4: Add the egg and vanilla extract to the creamed sugar and butter, beating until fully combined. Stir in the flour mixture and oat mixture until just combined. Gently fold in half of the fresh mixed berries.
Step 5: Spread the batter evenly into the prepared baking dish. Sprinkle a little extra sugar and oats on top, then scatter the remaining berries evenly over the batter.
Step 6: Bake the cake for 40 to 50 minutes, or until a toothpick inserted into the center comes out clean. Allow the cake to cool on a wire rack before serving.

Tips & Variations

For a nuttier flavor, add a handful of chopped walnuts or pecans to the batter before baking.
Swap the mixed berries for other seasonal fruits like raspberries or sliced peaches depending on availability.
Use brown sugar dark or light for a slightly different depth of sweetness.
If you prefer a gluten-free version, substitute the all-purpose flour with a gluten-free blend suitable for baking.

Storage

Store leftover oat cake in an airtight container at room temperature for up to 2 days. For longer storage, keep it in the refrigerator for up to 5 days or freeze it wrapped well for up to 1 month. Reheat slices gently in the microwave or oven before serving to restore its softness.

How to Serve

The image shows a white ceramic baking dish filled with a golden-brown baked dessert topped with dark purple and black berries and sprinkled with light brown oats. Next to the dish, there are two empty white plates with a subtle embossed pattern on the rim, each holding a silver fork resting diagonally. The items are placed on a textured yellow cloth, all set on a white marbled surface. photo taken with an iphone --ar 4:5 --v 7

Serve this delicious recipe with your favorite sides.

FAQs

Can I use rolled oats instead of quick cooking oats?

Yes, rolled oats can be used if you prefer a chewier texture, but soak them a bit longer in water (about 10-15 minutes) before mixing to help soften them.