Preheat oven to 350°F and line 2 baking sheets with parchment paper. Cream together the butter and sugars until light and fluffy. Mix in the egg and vanilla.
Add in the dry ingredients and mix until you have a cookie dough. Scoop the dough into about 10 large cookies and place on baking sheet.
Flatten the cookies using the bottom of a glass cup dipped in sugar. This gives the cookies that classic sugar cookie look. Bake for about 8 min and let cool. Top with your favorite frosting and enjoy!