Prepare your 9-inch tart pan by lightly buttering the bottom and sides.
In a large bowl, use an electric mixer to cream the softened butter and sugar together until the mixture is light, fluffy, and well-blended. 2.
Add the egg yolk and almond extract to the creamed butter and sugar.
Beat again until everything is fully incorporated and smooth. 3.
Add the all-purpose flour and finely ground almonds to the bowl.
Mix on low speed just until the dough comes together into a crumbly mixture. Be careful not to overwork the dough, as this will keep the crust tender. 4.
Transfer the crumbled dough directly into your prepared tart pan. Lightly dust your fingers with a bit of flour and press the dough firmly and evenly across the bottom and up the sides of the pan. 5.
Chill the crust in the refrigerator for at least 30 minutes. This step is crucial to prevent it from shrinking during baking.
Once chilled, proceed with your tart recipe's for filling and baking.