Butter Tarts

Ingredients

Pastry:

1 1/4 cups all-purpose flour

1/4 tsp salt

1/2 cup cold unsalted butter, cubed

1 egg yolk

1 tsp vinegar

Ice water

Filling:

1/2 cup packed brown sugar

1/2 cup corn syrup

1/4 cup unsalted butter, softened

1 egg

1 tsp vanilla extract

1 tbsp white vinegar

1/4 tsp salt

1/2 cup raisins or chopped pecans (optional)

Instructions

Prepare the pastry: In a bowl, mix flour and salt. Cut in cold butter using a pastry cutter or fingers until the mixture resembles coarse crumbs.

In a separate small bowl, whisk together egg yolk, vinegar, and just enough ice water to make 1/4 cup of liquid. Stir into the flour mixture until the dough comes together. Form into a disc, wrap in plastic, and chill for 30 minutes.

Roll out chilled dough on a lightly floured surface to about 1/8-inch thickness. Cut into 3.5-inch circles and press into a muffin tin. Chill again while you make the filling.

Make the filling: In a bowl, cream together brown sugar, corn syrup, butter, egg, vanilla, vinegar, and salt until smooth.