Thick Cut-Out Sugar Cookies

Ingredients
6 egg yolks
4 eggs
2 cups butter, softened
2 1/8 cups white sugar
7 cups all-purpose flour
1 tablespoon baking powder
1/2 teaspoon salt
1 1/2 teaspoons vanilla extract
4 cups confectioners' sugar
1/4 cup vegetable oil
1/2 teaspoon vanilla extract
1 tablespoon hot water or as needed

Directions
In a large bowl, cream together the butter and sugar until smooth. Beat in the eggs, one at a time, mixing well after each. Combine flour, baking powder, and salt; stir into the sugar mixture. Cover dough and chill for at least one hour.

Preheat the oven to 375 degrees F (190 degrees C). Grease cookie sheets. On a floured surface, roll the dough out to 1/2 inch thick and cut into desired shapes using cookie cutters. Place 2 inches apart on to the prepared baking sheets.

Bake for 8 to 10 minutes in the preheated oven. Allow cookies to cool on baking sheet for 5 minutes before removing to a wire rack to cool completely. To make frosting, mix together the confectioners' sugar, oil and 1 teaspoon vanilla until smooth. gradually add enough hot water to achieve a spreadable consistency.

SOURCE: http://allrecipes.com/recipe/24462/thick-cut-outs/