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Fudgy Oat Flour Chocolate Cake - Rich, Moist, and Gluten-Free

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Prep Time 15 minutes
Cook Time 30 minutes
Total Time 45 minutes
Servings: 8 servings
Ingredients Method

Ingredients
  

  • Oat flour (store-bought or finely ground rolled oats)
  • Unsweetened cocoa powder (Dutch-process or natural)
  • Dark chocolate (60–70%), chopped or chips
  • Granulated sugar (or coconut sugar)
  • Eggs
  • Milk (dairy or unsweetened almond milk)
  • Neutral oil (avocado, light olive, or canola) or melted butter
  • Plain yogurt or sour cream
  • Vanilla extract
  • Baking powder
  • Baking soda
  • Fine sea salt
  • Optional: Espresso powder, flaky salt, chocolate chips for topping
  • Optional ganache: Heavy cream and more dark chocolate

Method
 

  1. Prep the pan: Heat oven to 350°F (175°C). Grease an 8-inch round or square pan and line the bottom with parchment.
  2. Melt the chocolate: In a microwave-safe bowl, melt 3 ounces dark chocolate in 20–30 second bursts, stirring until smooth. Set aside to cool slightly.
  3. Mix the dry ingredients: In a large bowl, whisk 1 1/2 cups oat flour, 1/2 cup cocoa, 1 teaspoon baking powder, 1/2 teaspoon baking soda, and 1/2 teaspoon salt. If using, add 1 teaspoon espresso powder.
  4. Combine the wet ingredients: Add 3/4 cup sugar, 2 large eggs, 1/3 cup oil, 1/2 cup milk, 1/3 cup yogurt, and 2 teaspoons vanilla to the bowl. Whisk until mostly smooth.
  5. Stir in the chocolate: Pour in the melted chocolate and stir until the batter is glossy and thick. Avoid overmixing.
  6. Fill the pan: Scrape the batter into the prepared pan. Smooth the top. Sprinkle on a handful of chocolate chips if you like.
  7. Bake: Bake 24–30 minutes, until the edges are set and a toothpick comes out with a few moist crumbs. Do not overbake—this keeps the cake fudgy.
  8. Cool: Let the cake cool in the pan for 15 minutes, then transfer to a rack to cool completely.
  9. Optional ganache: Warm 1/2 cup heavy cream until steaming. Pour over 4 ounces chopped chocolate and let sit 2 minutes, then stir smooth. Spread over the cooled cake.