Recipe courtesy of my sister, Katie
1 cup water
1/2 cup (1 stick) butter
1/2 teaspoon salt
1/4 teaspoon freshly ground pepper
1 cup flour
4 eggs, at room temperature
1 cup grated sharp cheddar cheese (or Gruyère)
1 teaspoon dry mustard
Large pinch cayenne pepper
Preheat oven to 375º. Line baking sheet with parchment paper.
Bring water, butter, salt and pepper to a boil. All at once, add flour, mustard and cayenne. Stir vigorously till well mixed. Turn off flame and add eggs, one at a time, and again stir vigorously with a wooden spoon. Stirring must start immediately after egg is added to prevent cooking the eggs. Once the first egg is incorporated, add second and proceed in the same manner till all eggs are added. Stir in cheese.
Spoon or pipe tablespoonfuls of dough onto prepared baking sheet. Bake 30 minutes, rotating baking sheet at halfway point if desired. Cool slightly before serving.
Makes approximately 24 puffs.