We've tried a lot of sugar cookie recipes over the years and found this one to be the best. It works especially well for these candy-filled cookies since, unlike store-bought dough, it holds its shape when baked. Use this recipe to make these delightful Umbrella Cookies.
Using an electric mixer at medium-high speed, cream the butter, gradually adding the sugar. Beat in the egg until evenly mixed, then blend in the vanilla extract and salt.
With a wooden spoon, stir the flour into the creamed ingredients, about one third at a time, until evenly blended. The dough may seem soft, but it will firm up when refrigerated.
Divide the dough into half. Flatten each portion into a disk and seal in plastic wrap. Refrigerate overnight.