Cheddar and Herb Gougères | notes.improvisedscience.org.

Ingredients

• 170g (¾ cup or 1½ sticks) unsalted butter
• 180ml (¾ cup) whole milk
• 1 tsp. Diamond Crystal or ½ tsp. Morton kosher salt
• 188g (1½ cups) all-purpose flour
• 5 large eggs
• 1 large egg, separated
• 3 scallions, thinly sliced
• 226g (8 oz.) sharp yellow cheddar, grated, divided
• 2 Tbsp. finely chopped dill
• 1 Tbsp. whole grain mustard
• ¼ tsp. freshly ground pepper