Sour Cream and Onion Biscuits

Place a rack in middle of oven; preheat to 425°. Line a baking sheet with parchment paper. Trim root ends from 8 scallions. Thinly slice crosswise (not on a diagonal); set aside.

Cut remaining 10 Tbsp. chilled unsalted butter into ½” pieces. Add to dry ingredients and toss to coat. Using your hands, work butter into dry ingredients, smashing it between your fingers and flattening it between your palm until there are lots of thin shards and pea-size bits. Add reserved scallions and toss to evenly distribute.

Create a well in the center of mixture and add 1¼ cups sour cream to the center. Using a fork and working in circles, mix until large shaggy clumps form. If your bowl is wide enough, fold dough over itself a couple of times inside it until it comes together.