Low Sugar Gluten Free Coffee Cake with Streusel

Total time1 hr 15 min

Prep time20 min

Cook time40 min

Low Sugar Gluten Free Coffee Cake with Streusel

This coffee cake starts with a tender, moist crumb built from sour cream, eggs, and softened butter, all folded into a gluten free flour base that bakes up soft and rich. A ribbon of warm cinnamon runs through the center, so every slice reveals that classic swirled layer once it's cut. The top gets piled high with a buttery, cinnamon-flecked streusel that turns deep golden and slightly crisp in the oven, giving real contrast against the soft cake underneath. A light drizzle finishes each square, adding just enough sheen without weighing down the crumb. It's a great make-ahead brunch bake, and it holds up beautifully for anyone keeping an eye on added sugar. Cut into neat squares, it looks like a bakery-case classic but comes together with a straightforward, one-pan method anyone can pull off at home.

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Ingredients

9 servings

For the cake

½ cup unsalted butter, softened
Land O Lakes Whipped Butter Salted - 8 Oz Kerrygold Pure Irish Butter Sticks Kerrygold Butter Pure Irish Unsalted - 8 Oz Kerrygold Pure Irish Unsalted Butter Vital Farms Pasture Raised Sea Salted Alfresco Butter - 8 Oz
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¾ cup granulated sugar
Chef's tip
Use the same volume. Baking behavior varies by blend: some brown faster or stay softer, while others brown less. Follow the package's baking guidance and start checking a few minutes early.
2 large eggs, room temperature
1 tsp vanilla extract
1 cup sour cream
2 cups gluten free flour
1 ½ tsp baking powder
½ tsp baking soda
½ tsp salt

For the cinnamon filling

¼ cup packed light brown sugar
Chef's tip
Use the same volume. Brown-sugar replacements vary in moisture, spread, and browning, so follow the package's baking guidance and start checking a few minutes early.
1 tsp ground cinnamon

For the streusel

½ cup packed light brown sugar
Chef's tip
Use the same volume. Brown-sugar replacements vary in moisture, spread, and browning, so follow the package's baking guidance and start checking a few minutes early.
½ cup gluten free flour
1 tsp ground cinnamon
¼ tsp salt
4 tbsp unsalted butter, cold and cut into small cubes

For the glaze

½ cup powdered sugar
Chef's tip
Follow the package's conversion to powdered sugar. In frosting or glaze, add liquid gradually - replacements can absorb it differently.
1–2 tbsp milk

Instructions

1
Preheat the oven to 350°F (175°C). Grease a 9×9-inch baking pan and line it with parchment paper, leaving an overhang on two sides for easy lifting.
2
Make the streusel: In a small mixing bowl, stir together the 1/2 cup brown sugar, 1/2 cup gluten free flour, 1 tsp cinnamon, and 1/4 tsp salt. Add the cold cubed butter and work it in with your fingertips until the mixture forms coarse, pea-sized clumps. Refrigerate while you prepare the batter.

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