I've used this gingerbread house and royal icing recipe for several years at Christmas. It's always worked out very well - easy to make, cut out, bakes evenly, and the house is sturdy (depending on your construction skills).
Two tips: 1) To make stained glass windows, cut out a window from cut-out dough (one of the sides of the house). Place the piece on the baking sheet. Add crushed, transparent hard candies to the cut-out area. They will melt during baking.
2) Assemble the house in stages at least the day before decorating. This will the icing to harden sufficiently before decorating.
from Simply Recipes
6 cups all purpose flour
1/2 teaspoon baking powder
4 teaspoons ground ginger
4 teaspoons ground cinnamon
1/2 teaspoon ground cloves or allspice
1/2 teaspoon salt
1 1/2 sticks (12 Tbsp) butter, softened
1 1/2 cups packed light brown sugar
2 large eggs
1 cup dark molasses
1 Tbsp water
Whisk together the dry ingredients in a large bowl, set aside.
Using an electric mixer, beat on medium speed the butter and brown sugar until fluffy and well blended. Beat in the eggs, molasses and water until well combined.
Beat half of the flour mixture into the molasses mixture until well blended and smooth. Stir in the remaining flour. Knead (or use your mixer's dough hook) until well blended. If dough is too soft, add a little more flour.
Wrap the dough in plastic wrap and refrigerate at least two hours, preferably overnight. You can make it up to 3 days ahead of time. Let sit at room temperature for at least 10 minutes before rolling out.
Preheat oven to 350°F, with the oven rack in the middle. Have several flat cookie sheets ready, preferably ones that you know will not warp in the oven heat.
Divide the dough in two. Spread parchment paper or wax paper on a large flat surface for rolling. Dust the paper lightly with flour. Working with one portion of the dough at a time, use a rolling pin to roll out the dough to an even thickness of 1/4-inch. Add a little flour to the surface of the dough, and check for sticking as you roll it out. If it sticks to either your rolling pin or the rolling surface, dust with more flour. If the rolled out dough is very soft, you may want to freeze it for an hour before cutting out the patterns.
Rub a little flour over the surface of the dough. Place the pattern pieces on the dough, as many pattern pieces as will fit on the dough. Use a small sharp knife to cut out the pattern pieces from the dough, wiping the knife surface clean frequently. Depending on how soft the dough is, you may need to use scissors to cut the wax paper or parchment paper. You can cut out the patterns through the dough and parchment paper, placing the dough pieces with the paper directly on the cookie sheets. If you are not using parchment paper or wax paper, you may need to use a large metal spatula to transfer the dough pieces to a greased cookie sheet. Space the pieces on the cookie sheet an inch apart from each other. If dough pieces stretch during the transfer process, push them back into shape.
You can cut out a door and window(s) at this point, or you can wait until after baking, soon after the pieces have come out of the oven while the cookies are still warm.
Bake in a 350°F oven until the edges are just beginning to darken, 11-15 minutes for the large pieces, 6-8 minutes for the small pieces. Rotate the cookie sheets half way through the baking for more even browning. Remove the sheets to racks to cool, about 15 minutes.
While the pieces are still slightly warm, lay the pattern pieces over them and use a large straight chef's knife to trim off any parts of the pieces that have through cooking spread beyond the pattern.
2 large egg whites
2 2/3 cup powdered sugar, divided
Whisk together until smooth the egg whites and 1 1/3 cups of the powdered sugar.
If you are planning to eat your gingerbread house, and are concerned about the safety of raw eggs, you can microwave the egg white powdered sugar mixture for several seconds (30-40) until the mixture reaches a temperature of 160 degrees, but not higher than 175°F. You can also use pasteurized dried or liquid egg whites.
Add the remaining 1 1/3 cup of powdered sugar to the sugar egg mixture. Using an electric mixer, beat on high speed until the icing holds stiff peaks. If it doesn't form stiff peaks, add more powdered sugar.
Place a dampened clean towel over the bowl of royal icing. Keep this towel over the icing to prevent it from drying out while you work with it.
When you are ready to mortar or decorate, fill a pastry bag with the icing. If you don't have a pastry bag, you can make your own with a re-sealable plastic freezer bag, just cut off the tip (a small cut) of one of the corners of the bag. Plastic or metal piping tips are available in supermarkets which you can also use with a freezer bag, for more controlled piping.