When I sat down to write this post about my friend Francis’ 1st birthday party, I realized I’ve documented all the major events leading up to this milestone: his parents’ engagement party, his mom’s wedding shower, and of course his baby shower!
  1. Preheat oven to 375°, and line a 9×13″ pan with parchment paper or foil (spray with non-stick spray if using foil).
  2. In a large bowl, whisk together the flour, sugar, baking powder, salt and lemon zest (if using).
  3. Add the cold cubes of butter, and cut into the flour mixture with a pastry cutter or a fork. When the mixture is crumbly, and the butter is the size of peas, add the whisked egg and stir to combine.
  4. Add half of the dough to the pan, and press into an even layer. Set the other half of the dough aside.
  5. For the filling, stir the blueberries, sugar, cornstarch and lemon together in a medium bowl, then pour over the crust and spread evenly.
  6. Crumble the remaining dough over top of the blueberries.
  7. Bake for 45 minutes until crumbs on the top are starting to brown, and the blueberries are bubbling. Cool completely and cut into squares.