In a large bowl whisk flour, sugar and salt until fully combined and cut butter into small chunks
Pop butter chunks , flour mixture and the water into the freezer for 10-15 minutes
Once all ingredients are nicely chilled, add very cold butter chunks into flour and rub the mixture between your fingers. Leave some bigger butter chunks in the mixture, no need to fully incorporate butter into the flour
Add very cold water into the dough, a small amount at a time and stir with a spatula or wooden spoon after each addition
Start working the dough with your hands. First it will look crumby but it should come together in the next minute or so. Remember, leave in some butter chunks, do not overwork the dough, do not use a mixer
Form 2 disks, cover them with plastic wrap and let them rest in the fridge for minimum 2 hours
Assembling and Baking
After 2 hours, take one of the pie dough disks out of the fridge and let it rest few minutes on the kitchen counter. The dough should stay cold but slightly warmed up to be able to roll it out without breaking it
Transfer the disk to a lightly floured surface or Silicone baking mat and start rolling it out. Make sure you turn the dough with your hands after each rolling so it will become even. No need to add too much flour while rolling, the pie dough should be cold enough not to stick to the kitchen counter. If at any point the dough gets too warm, pop it back to the freezer for a minute and continue
Roll the dough either into a 20cm (8inch) square or a 40x10cm (16x4 inches) rectangle. Trim with a sharp knife to achieve the exact size then cut into 4 - they will be the envelopes. Place the squares into the fridge for 15 minutes before filling
The leftover trimmed dough can be reused after chilling, make the heart shapes out of it
Continue rolling the other half of the dough
After chilling time ends, place the squares on parchment paper or even better if using Perforated "air" baking mat for even baking
Place about ½ tablespoon of almond flour and approx 1 tablespoon of filling in the center of each crust then fold it into an envelope shape if the dough is cold enough otherwise chill
Place the hearts on top and apply egg wash
Place unbaked hand pies to the freezer for 15 minutes while pre-heating oven to 190C / 374F
Bake for about 30 minutes or until top is golden brown and bottom is evenly baked
Let hand pies slightly cool in the baking tray for 5 minutes then move them onto a cooling rack