½ cup (1 stick) butter, softened
1 cup light brown sugar
3 tablespoons granulated sugar
1 large egg, room temperature
2 teaspoons vanilla extract
1¾ cups all-purpose flour
½ teaspoon baking powder
½ teaspoon baking soda
½ teaspoon salt
2 teaspoons instant coffee powder/granules
Preheat oven to 300 degrees F.
Cream the butter with the sugars using an electric mixer on medium speed until fluffy, approximately 30 seconds. Beat in the egg and the vanilla extract for another 30 seconds.
In a separate mixing bowl, sift together the dry ingredients and beat into the butter mixture at low speed for about 15 seconds. Stir in the coffee powder until incorporated.
Using a 1-ounce cookie scoop or a 2-tablespoon measure, drop cookie dough onto a greased cookie sheet about 3 inches apart. Gently press down on the dough with the back of a spoon or bottom of a clean glass to spread out into a 2-inch circle (these bake up flat, not thick). Bake for 18-20 minutes or until nicely browned around the edges but still soft in the middle.