Butter Tart Squares

The Canadian butter tart in tray form: a shortbread base under a runny brown sugar and raisin filling. Baking it in a pan means no pastry shells to line and no leaks.

Butter Tart Squares

AI-generated illustration

Contains:dairyegggluten

Ingredients

Method

  1. Rub 12 tablespoons of the unsalted butter into 1 1/2 cups of the all-purpose flour with the granulated sugar and 1/4 teaspoon of the salt until the mixture holds together when squeezed.
  2. Press it firmly and evenly into a parchment-lined 9-inch (23 cm) square pan and bake at 350 degrees F (180 degrees C) for 15 minutes, until the surface looks dry and the edges are barely colored.
  3. Melt the remaining 4 tablespoons butter and whisk it with the packed brown sugar, large eggs, white vinegar, vanilla extract, baking powder, the remaining 2 tablespoons flour, and the remaining 1/4 teaspoon salt until smooth.
  4. Scatter the raisins over the hot base and pour the filling over them.
  5. Bake 25 minutes more, until the filling is set at the edges and still trembles slightly in the very center; it firms as it cools and overbaking turns it to caramel candy.
  6. Cool completely in the pan, at least 1 hour, then lift out by the parchment and cut into squares with a hot dry knife.

Notes

  • The vinegar is not optional; it keeps the sugar filling from crystallizing into a grainy layer.