Preheat oven to 325 degrees.
Mix the following ingredients until smooth:
1 1/2 sticks unsalted butter (must be soft)
2 3/4 cups sugar
1 teaspoon Kosher salt
Then add the following ingredients and mix until smooth:
8 egg yolks
1/4 cup heavy cream
1 Tablespoon 1-1/2 teaspoon vanilla extract
8 cups all-purpose flour.
Mix everything thoroughly until dough comes together. Gather to a ball and flatten to a disc.
Chill the dough until firm. You might want to prepare the dough in the evening before you plan on baking and chill it overnight.
When chilled, roll to 1/4 inch thickness, and cut into shapes with cookie cutters. Sprinkle tops with assorted sugars, jimmies and sprinkles.
Bake at 325 degrees F for 10-12 minutes on either a sheet greased with vegetable oil spray or a cookie sheet pan with parchment paper. Edges will be golden when they are done.
You may also bake the cookies plain, cool them, and then brush with icing sugar. Cover the whole surface of the cookie.
Serves: 4 dozen."