Ingredients
1 1/2 cups brown-rice flour
1/2 cup potato starch
2 tablespoons sugar
2 teaspoons baking powder
1/2 teaspoon baking soda
1/2 teaspoon kosher salt
1/4 teaspoon xantham gum (optional)
2 cups buttermilk
2 large eggs
2 tablespoons unsalted butter, melted, plus room-temperature butter for serving
Safflower or other neutral-flavored oil
Pure maple syrup, warmed, for serving
Preparation
In a large bowl, whisk together flour, potato starch, sugar, baking powder, baking soda, salt, and xantham gum, if using, until well combined. In a small saucepan, gently heat buttermilk over low until warm to the touch. Transfer to a large liquid-measuring cup; whisk in eggs and melted butter. Make a well in center of flour mixture; stir in buttermilk mixture until lumpy and just combined (do not overmix). Let stand 10 minutes.
Meanwhile, preheat oven to 200 degrees and place a rimmed baking sheet fitted with a wire rack inside. Heat a large nonstick skillet over medium; lightly brush with oil.
Working in batches, add heaping quarter-cups of batter to skillet, spreading lightly with the bottom of the cup. Cook until bubbles form on surface, edges have set, and undersides are golden brown, about 4 minutes. Flip and continue cooking until other sides are golden brown, 2 to 3 minutes more. Transfer to prepared sheet in oven to keep warm while you cook remaining pancakes. Serve with room-temperature butter and a drizzle of maple syrup.