A moist, tender gluten-free chocolate chip coffee cake loaded with mini chocolate chips, topped with a buttery cinnamon streusel, and finished with a vanilla glaze. Made with sour cream for a rich crumb that stays soft for days.
4tablespoons(56g)unsalted butter - melted and slightly cooled
Coffee Cake Ingredients:
1½cups(210g)gluten-free flour blend - Bob’s Red Mill 1-to-1 Gluten-Free Baking Flour, which already contains xanthan gum
2teaspoonsbaking powder
2teaspoonsground cinnamon
½teaspoonbaking soda
½teaspoonsalt
½cup(113g)unsalted butter - room temperature
¾cup(150g)granulated sugar
1(50g)large egg - room temperature
¾cup(180g)sour cream
½cup(120g)whole milk
1½teaspoonsvanilla extract
1½cups(270g)mini chocolate chips - divided (260g)
Glaze Ingredients:
½cup(60g)powdered sugar - 105g
1-2tablespoonsmilk
½teaspoonvanilla extract
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Instructions
For the gluten-free streusel:
In a small bowl, whisk together ½ cup(70g) gluten-free flour, ¼ cup(50g) granulated sugar, ¼ cup(50g) light brown sugar, ½ teaspoon ground cinnamon, and ¼ teaspoon salt.
Pour in the melted 4 tablespoons(56g) unsalted butter and mix with a fork until clumpy crumbs form. You want a mix of large and small pieces. Refrigerate while you make the cake batter.
For the coffee cake:
Preheat the oven to 350°F. Grease an 8x8-inch baking pan with cooking spray or line with parchment paper.
In a large bowl, whisk together 1½ cups(210g) gluten-free flour blend, 2 teaspoons baking powder, 2 teaspoons ground cinnamon, ½ teaspoon baking soda, and ½ teaspoon salt. Set aside.
In a separate bowl, beat ½ cup(113g) unsalted butter and ¾ cup(150g) granulated sugar with an electric mixer until light and fluffy, about 2 to 3 minutes.
Add 1(50g) large egg, ¾ cup(180g) sour cream, ½ cup(120g) whole milk, and 1½ teaspoons vanilla extract. Mix until smooth, scraping down the sides of the bowl as needed.
Add the dry ingredients to the wet ingredients and mix until just combined and no streaks of flour remain.
Add half of the 1½ cups(270g) mini chocolate chips to the batter, reserving the rest for later. Mix to combine.
Transfer the batter to the prepared pan and smooth the top with a spatula.
Sprinkle the remaining ¾ cup mini chocolate chips evenly over the batter.
Sprinkle the chilled streusel over the chocolate chips.
Bake at 350°F for 30 to 40 minutes. The cake is done when the top is golden brown and an instant-read thermometer inserted into the center reads between 200 and 210°F. Let cool completely in the pan on a wire rack.
For the glaze:
In a small bowl, whisk together ½ cup(60g) powdered sugar, 1-2 tablespoons milk, and ½ teaspoon vanilla extract until smooth. If the glaze is too thick, add more milk a little at a time until it reaches a drizzling consistency.
Drizzle the glaze over the cooled coffee cake. Let the glaze set before slicing and serving.
Notes
Flour: I used Bob's Red Mill 1-to-1 Gluten-Free Baking Flour (blue bag), which contains xanthan gum. This is the only blend I've tested. Results may vary with other blends.
Chocolate chips: Mini chips work best. They distribute more evenly and the top layer melts together as it bakes. Regular-size chips tend to sink in this batter.
Doneness: Don't rely on the toothpick test for this cake. The layer of melted chocolate chips under the streusel will make a toothpick look wet even when the cake is done. Use an instant-read thermometer (200 to 210°F) or look for golden edges pulling away from the pan.
Storage: Store covered at room temperature for up to 3 days or in the refrigerator for up to 1 week. To freeze, wrap individual slices in plastic wrap and store in a freezer bag for up to 3 months.