Classic, soft sugar cookies, perfect for cutting into shapes and sprinkling with sugar, or covering with frosting. These cookies are so delicious, they'll disappear quickly!
In a mixing bowl, cream the butter and sugar well. Add the eggs, vanilla and sour cream. Mix well.
Stir in the flour, salt and baking powder until just combined. Wrap dough in plastic wrap, flatten and chill until cold (about 2 hours).
Heat oven to 400ºF. Roll dough to about ⅜-inch-thick on floured parchment. Chill rolled sheet of dough before cutting if necessary (dough gets soft quickly). Cut cookies into shapes and bake until just done, 8 to 10 minutes. Cool and frost.
Notes
Adding sour cream to the cookies makes them more cakey and soft. You can leave it out for a thinner, buttery soft sugar cookie.
Leave cookies in oven a few extra minutes if you like a little golden color on them. This will change the texture slightly (they will be a bit dry but have a caramelized flavor), and they will still be soft.