Bakery-Style Blueberry Muffins, Gluten Free

Instructions

1. 1

   Make the streusel first

   Stir the gluten-free blend, brown sugar, granulated sugar, and cinnamon together in a small bowl, then fork in the melted butter until it clumps like damp sand. Set it aside — it can sit while the batter rests later. Hold off on heating the oven for now, since this batter needs a rest before it bakes.

2. 2

   Whisk the dry ingredients

   In a large bowl, whisk the gluten-free flour blend, xanthan gum, granulated sugar, baking powder, baking soda, and salt together thoroughly, a good thirty seconds. Check your blend's label first: if it already lists xanthan gum or guar gum, leave the xanthan out entirely or the muffins will turn gummy and dense.

3. 3

   Combine the wet ingredients

   In a second bowl, whisk the melted butter with the oil, then whisk in the eggs until smooth. Add the sour cream, milk, vanilla, and lemon zest and whisk until uniform. Room-temperature dairy matters here — cold liquid will re-solidify the melted butter into flecks.

4. 4

   Mix the batter

   Pour the wet into the dry and fold with a spatula until no dry pockets remain. Unlike wheat batter, you don't need to fear overmixing — there's no gluten to toughen, so mix until it's genuinely smooth and evenly combined. It will look thinner than you expect at this stage, which is normal.

5. 5

   Fold in the berries

   Toss the blueberries with the tablespoon of flour blend, then fold them through the batter. Keep frozen berries frozen and work fast so they don't streak the batter.

6. 6

   Rest the batter

   Cover the bowl and let it sit at room temperature for 30 minutes. This is the step that makes or breaks gluten-free muffins — the rice flour and starches need time to fully absorb the liquid, and without it you'll get a gritty, sandy crumb. The batter will noticeably thicken as it sits and should hold a soft mound on a spoon by the end.

7. 7

   Heat the oven and fill the pan

   During the last 20 minutes of the rest, heat the oven to 425°F (220°C) with a rack in the middle and line a 12-cup muffin pan. Divide the rested batter among the liners, filling each to the rim, then scatter the streusel over the tops and press it gently into place.

8. 8

   Bake hot, then lower

   Bake at 425°F for 5 minutes, then reduce the oven to 350°F (175°C) without opening the door and bake 18 to 21 minutes more. Gluten-free muffins brown a little faster but set a little slower, so go by the center rather than the color: the dome should feel firm and spring back, and a toothpick should come out with moist crumbs and no wet batter. Underbaked gluten-free centers stay sticky and won't correct as they cool.

9. 9

   Cool completely

   Rest the muffins in the pan for 5 minutes, then move them to a wire rack and let them cool all the way. Gluten-free crumb is fragile and slightly damp while hot — it firms up and sets properly only once fully cooled, so resist cutting into one early.

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Baker's Tips

• 1.

  The batter should be thick enough to mound on a spoon rather than pour. If yours seems loose, your sour cream was likely thin — add 2 tablespoons of flour and fold briefly.

• 2.

  For even taller tops, fill only 10 liners instead of 12 and fill them slightly above the rim. Add 2 to 3 minutes to the bake time.

• 3.

  Wild or small blueberries distribute better than large cultivated ones and give you more berry in every bite.

• 4.

  If the streusel looks sandy rather than clumpy, your butter has cooled too much. Warm it for a few seconds and re-toss.

• 5.

  Chilling the filled pan for 20 minutes before baking firms the fat and produces an even more pronounced dome — useful if you're mixing the batter the night before.

• 6.

  Skip the streusel and finish with a heavy sprinkle of coarse sparkling sugar for a crackly, simpler top.