Mix all dry ingredients with the flour on a work surface or silicone pastry mat, then make a well in the center.
Add in the vegan butter and eggs. Mix with your fingers or pastry scraper until the dough turns to coarse crumbs.
Quickly knead until the dough holds together. Shape the dough into a ball, wrap with cling film, and chill for at least an hour.
Roll the very cold dough between two sheets of parchment paper. For optimal baking, try to achieve a thickness of around 3-4 cm (1/4 inch). Use dough measuring strips for even thickness.
For smaller tart crusts, use cookie cutters according to the shapes you want, then carefully press the cut dough into the tart tins.
For larger crusts, carefully lift the dough to a pie dish or tart ring. Prick the crust bottom with a fork, then trim the edges. Freeze or chill for 20 minutes before baking.
Pre-bake larger tart crust for 15 minutes at 175°C (350°F) in a preheated oven, remove the weights and parchment paper, then bake for 7 to 10 minutes more.
Pre-baking is unnecessary if your filling is uncooked and needs longer baking than the crust.
For smaller tart crusts, bake for 12 to 15 minutes. Place baked crust on a wire rack and cool at room temperature before using.