Step 1

Place a rack in the center of your oven and preheat to 325°F. Add the softened butter, 1 cup of granulated sugar, and the brown sugar to a bowl.

Step 2

Mix with a hand beater or stand mixer until the butter has lightened in color and has the consistency of a mousse, about 3 to 4 minutes.

Step 3

Scrape down the sides of the bowl and add one egg. Mix to incorporate. Scrape down the side of the bowl again. Add the second egg and the vanilla. Mix to incorporate.

Step 4

In a separate bowl, mix the baking powder, salt, and sifted flour. Add the flour mixture to the butter mixture in two batches, incorporating it fully between additions, until a dough forms. Rest the dough, uncovered, in the refrigerator for 15 minutes.

Step 5

Mix the remaining 1/4 cup of sugar with the tablespoon of cinnamon. Shape 2-tablespoon portions of the cookie dough into balls and place them on a sheet pan lined with parchment paper. Roll each ball in the cinnamon sugar twice.

Step 6

Bake for 5 minutes. Rotate the sheet pan front to back. Bake for 4 to 5 minutes more or until the sides of the cookies deepen in color. Wait a few minutes before placing them on a cooling rack.