I should state at the outset that I’m a pastry neophyte. Before I started The Project, I think I’d made two pies in my life. Sure, I baked stuff in pie shells, but I always picked up the Tenderflake pre-made ones, and figured it was good enough. I don’t really have a knack for pastry, but I’m working on it. This is the inaugural entry for the Pies, Tarts, and Pastries chapter of The Book, so hopefully my pastry skills will improve as I work my way through it.
This pie dough is a sweetened and butter based. It gets used in all sorts of other recipes in The Book. I definitely prefer a sweetened dough for dessert pies and tarts. My mother is a rolling pin virtuoso whose pies always turn out perfectly, but she uses the same lard based dough for all her recipes. We have tourtière (a spiced meat pie) every Christmas, which I adore. I particularly like the way the crust is infused with the meaty filling’s flavour. However, when summer comes around and she starts baking up fruit pies using the same dough, I can’t help but imagining the taste of the meat filling along with the crust. Tourtière innards and strawberries aren’t destined to be the next great taste sensation. She recently started adding sugar to her dough for sweet pies, and it made a world of difference. Somehow a little sugar gets rid of the yuletide association, and the pies become pure summer.
The ingredients and method for this dough are pretty standard, combine flour, sugar, and salt, then blend butter in until you’ve got pea sized lumps in a sandy mixture. Then egg yolk and a bit of water are incorporated, until the dough barely holds together. The dough is then divided up, smeared once with your palm, and refrigerated for an hour.
I had some trouble with rolling this dough out. I’ve made it twice, the photo above is the most recent attempt. You can see the scraps to the left, which were probably 40% of the pie dough. I had a really tough time getting it to roll out evenly, and small cracks at the edges developed into big fissures as I was rolling. It was actually fairly easy to work with, and I think my problems were a matter of technique rather than the recipe. The first time I made it was much more of a fiasco though. I made it in late August, on a day with 95% humidity, and it didn’t go so well. Here’s a photo of the crust after baking. 
You can see that I had to do a lot of patching before I even got the dough into the oven, and small cracks I’d missed developed into chasms once baked.
The flavour of the dough is excellent, but the texture isn’t ideal. Butter doughs are usually tender, but not flaky. Using a mixture of lard or shortening with butter should give a flavourful dough with great texture. The Book’s Basic Pastry Dough takes this approach (without sugar), and I’m looking forward to trying it. This dough was perfectly fine, it tasted good, and the texture was totally acceptable, but I don’t think it’s the definitive sweet pastry dough. Perhaps as I make and remake it for all the recipes that call for it I’ll get the technique down. For now it’s very serviceable, and I’m content to keep using it.