Preheat oven to 375 F. In a large bowl place the cookie dough and flour. Stir with a wooden spoon or gently mix with hands until combined. On a lightly floured surface, roll out half of the dough at a time until 1/4-inch. Use a 6-inch house-shaped cookie cutter to cut out shapes or use a small knife to cut out house shapes of your own design. Arrange cutouts 3 inches apart on an ungreased cookie sheet. Leave cutouts plain and decorate after baking. (Or if desired, use a fluted pastry wheel to cut dough scraps into door or window shapes or roof outline and shingles and place them on house cutouts. Or for shingles, use the tip of a spoon to make shingle marks in the roof area of the cutout.)
Bake for 8 to 10 minutes or until edges are lightly browned. Cool on cookie sheet for 2 minutes; transfer to wire racks and let cool.
Use tubes of decorating icing to decorate cooled cookies. Sprinkle colored sugars, nonpareils, and/or sprinkles over the icing while still moist. Attach waffle-shaped pretzels with some of the icing for doors and windows.