¼cup(35g)gluten-free flour blend - I used Bob's Red Mill 1-to-1 Gluten-Free Baking Flour (in the blue bag), which already contains xanthan gum
⅓cup(67g)brown sugar
1teaspoonground cinnamon
3tablespoons(42g)cold unsalted butter
For the Muffins:
2 ½cups(350g)gluten-free flour blend - I used Bob's Red Mill 1-to-1 Gluten-Free Baking Flour (in the blue bag), which already contains xanthan gum
2teaspoonsbaking powder
½teaspoonbaking soda
½teaspoonsalt
2teaspoonsground cinnamon
1teaspoonground nutmeg
½cup(100g)granulated sugar
¼cup(50g)brown sugar
1cup(244g)whole milk
2(100g)large eggs
1/2cup(113g)unsalted butter - melted
1teaspoonvanilla extract
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Instructions
Preheat and Prep
Preheat oven to 350°F (175°C). Line a 12-cup muffin tin with paper liners or grease well with cooking spray. Set aside.
Make the Streusel Topping
In a small bowl, whisk together ¼ cup(35g) gluten-free flour blend, ⅓ cup(67g) brown sugar, and 1 teaspoon ground cinnamon.
Add 3 tablespoons(42g) cold unsalted butter pieces to flour mixture. Use a fork or pastry cutter to cut butter into flour mixture until it resembles wet sand and clumps together when pressed. The butter pieces should be no larger than peas.
Set aside in refrigerator while you make muffin batter.
Make the Muffins
In a large bowl, whisk together 2 ½ cups(350g) gluten-free flour blend, 2 teaspoons baking powder, ½ teaspoon baking soda, ½ teaspoon salt, 2 teaspoons ground cinnamon, and 1 teaspoon ground nutmeg until well combined. Set aside.
In a medium bowl, whisk together ½ cup(100g) granulated sugar, ¼ cup(50g) brown sugar, 1 cup(244g) whole milk, 2(100g) large eggs, melted 1/2 cup(113g) unsalted butter, and 1 teaspoon vanilla extract until smooth.
Pour wet ingredients into dry ingredients. Stir with a spatula just until combined. The batter should be thick and a few small lumps are okay.
Divide batter evenly among 12 muffin cups, filling each almost to the top.
Bake at 350℉ for 15-18 minutes, until tops spring back when lightly pressed and a toothpick inserted into the center comes out clean.
Remove from oven and let cool in pan for 5 minutes. Transfer muffins to a wire rack to finish cooling.
Notes
Gluten-Free Flour: I've tested this recipe with Bob's Red Mill 1-to-1 Gluten-Free Baking Flour, which contains xanthan gum. I've also tested many of my muffin recipes with King Arthur Measure for Measure Gluten-Free Flour, so I'm confident it will also work in this recipe. I cannot verify other gluten-free flour blends will work in this recipe.
Butter Temperature: Melted butter goes in the muffin batter. Cold butter goes in the streusel topping.
Muffin Cup Size: This recipe makes 12 standard-sized muffins. For mini muffins, bake for 10-12 minutes.
Storage: Store in an airtight container at room temperature for 3 days or freeze for up to 3 months.