Breakfast Biscuits

Biscuit Recipe:

2 1/2 cups (325 grams) all-purpose flour

2 1/2 teaspoons baking powder

1/2 teaspoon kosher salt

1 tablespoon (14 grams) granulated white sugar (optional)

1/2 cup (113 grams) cold unsalted butter, cut into small pieces

3/4 cup (180 ml) milk

1 large egg, lightly beaten

Topping:

1 large egg, lightly beaten with 1 tablespoon milk