Step 1 Cream the butter and sugar until light and fluffy. Add the yolk and egg, mixing to incorporate. Add the flour slowly and blend. Form the dough into a flat disk, wrap in plastic and chill 1 hour.
Step 2 On a lightly floured board, roll out the dough to 1/4 inch thick. Drape over the rolling pin and fit into a 9-inch tart pan with removable bottom. Press the dough tightly into the corners and edges. Pinch off the top edge to be flush with the pan. Set in the freezer 30 minutes.
Step 3Heat the oven to 400 degrees. Line the shell with foil then fill with pie weights or dried beans. Bake in the lower third of the oven until pale golden, 15 minutes. Remove weights or beans and bake another 5 minutes.