Butter Tart Squares

The best butter tart squares! These have a buttery shortbread crust and a layer of gooey brown sugar filling. You can add in walnuts, raisins, currants or leave them plain. Easier, quicker and more delicious than the original. This recipe can make 15 large bars or 36 more reasonable sized bars.

Plate of sliced butter tart bars.


9×13 Inch Pan


Base Layer

1 cup unsalted butter softened
½ cup powdered sugar
2 ¼ cup all-purpose flour

Butter Tart Filling

½ cup unsalted butter softened
1 cup brown sugar light or dark
2 tablespoons all-purpose flour*
4 large eggs
2 teaspoon vanilla extract
¾ cup dark corn syrup*
2 tablespoons white vinegar*
1 cup raisins, currants or chopped walnuts – optional I use ½ cup currants and ½ cup chopped walnuts

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