Gingerbread house pieces spreading: how to keep edges straight
Walls that come out of the oven a little fat, with wavy edges, are the usual reason a gingerbread house will not close. The Bake Off recipe gives two fixes: chill the pieces before baking, and trim them straight afterward. This page puts those next to a list of which pieces have to match, from the classic house, so you know where the trimming counts.
Step 1: chill before baking
The Great British Bake Off gingerbread house chills twice. It rolls the dough between sheets, wraps it in cling film and refrigerates it "for 30 minutes until firm". After you cut the pieces it says to "chill the gingerbread pieces for 1 hour (this will prevent them spreading during baking)". It bakes at 180°C (160°C fan, 350°F, Gas 4): small pieces for 10 minutes, large pieces for 15 minutes.
Cut the pieces from the printed template, slide them onto a lined tray with a spatula, and put the whole tray in the fridge. My guess is that a tray with a few pieces chills faster than a packed one. The one baking sheet guide shows how many pieces fit a pan.
Step 2: trim right after baking
The same Bake Off recipe says that if the pieces spread you can "trim around the pieces with a sharp knife while still hot". If they have already cooled, you can shave the edges by gently grating them with a fine grater. A food stylist, Kathy Krupa, quoted in a Food Republic piece on microplanes (via Real Simple) puts the pieces "back to back" and shaves the edges "with a sharp paring knife or a micro planer", and the article calls even, flat edges the key to easy assembly.
The generator's print page tells you to lay the paper piece back on the hot sheet and cut around it, so the pattern does the measuring. Paper that is printed at true scale (check the square on page one) gives you a line to cut to. If you printed at the wrong scale, the trimmed pieces will be wrong too, so measure the check square first.
Which edges have to match
Some edges matter more than others. On the classic 6 × 8 × 4 in house the pieces are these. Put each matching pair back to back and trim them together, so any error is the same on both.
| Piece | How many | Size | Trim these edges first |
|---|---|---|---|
| Front and back wall | 2 | 6 × 7 in | The two sides and the bottom, which meet the side walls and the board. |
| Side wall | 2 | 7.5 × 4 in | Both short ends, which meet the front and back walls. |
| Roof panel | 2 | 9 × 4.74 in | The long edge that meets at the ridge, and the edge that rests on the walls. |
A rough sense of what an error costs: if the front and back walls are each 3 mm too wide, the long walls sit up to 3 mm farther apart than the roof expects. That is my own worst-case arithmetic. 3 mm is about 1/8 in, which a bead of icing mostly hides.
The bottom edges matter too. My advice: a wall that rocks on its base stands at a slant and pulls the roof out of line, so run the bottom edge over fine sandpaper or a microplane until the piece stands flat on the counter.
When the wall is already baked and warped
- Slightly curled pieces can go back on a flat tray under a second tray for the first minutes of cooling. This is my suggestion; the recipes above do not mention it.
- Dough thickness changes bake time and strength. The thickness guide has the sizes and bake times I found.
- Use the joint setting in the generator for corners. It adjusts the wall widths for the dough thickness, so pieces trimmed to the pattern still meet at the corners. The assembly guide covers the icing for the seams.
- Make a spare roof panel and a spare wall. Re-rolled scraps may spread a little differently from fresh dough, so my suggestion is to keep the first-roll pieces for the walls.
Print a pattern to trim against
Open the classic house in the generator, print it, and check the square on page one. I expect a larger house to spread by more in absolute terms, so look at the large house guide if you are baking a big one. How much dough to make for a house with spare pieces is on the dough guide.