-
1
Place an oven rack in the middle position and preheat the oven to 350 degrees F. Line 2 large baking sheets with parchment paper.
-
2
In a medium bowl, whisk together flour, baking powder, and salt.
-
3
In a large bowl, beat butter and 1 1/2 cups granulated sugar with an electric mixer set on medium speed until the mixture is creamy and fluffy, 3 to 5 minutes. Beat in the eggs, one at a time, and then the vanilla extract.
-
4
Turn the mixer to low speed and gradually beat in the flour mixture until it is just combined. Using a rubber spatula, stir the mixture a few times to make sure all of the flour mixture is incorporated.
-
5
Place the remaining 1/2 cup granulated sugar in a small bowl. With slightly dampened hands, roll 2 tablespoons of the cookie dough between your palms to form a ball. Roll the ball in the sugar to coat it and place it on the prepared baking sheet. Repeat with the remaining dough, spacing the balls about 2 inches apart from each other on the baking sheets. Lightly coat the bottom of a glass or metal measuring cup with butter and dip into the sugar. Use this to gently flatten the cookies to 3/4-inch thickness.
-
6
Bake the cookies, one sheet a time, rotating the pans from front to back halfway through baking. They are done when the edges are set and beginning to brown, 9 to 10 minutes. The centers of the cookies should still be soft and puffy. Remove the cookies from the oven and let them cool on the baking sheet for 10 minutes. Using a spatula, remove the cookies from the baking sheet and let cool on a rack.
-
7
Spread the bottom of one cookie with 1 teaspoon Nutella and then top it with a second cookie to make a sandwich. Serve.
