- 12 (3 inch) unbaked tart shells
- 3/4 cup raisins
- 1/4 cup butter, softened
- 1/2 cup packed brown sugar
- 1/2 cup maple syrup
- 1 teaspoon vanilla extract
- 1/4 teaspoon salt
- 1 egg, lightly beaten
- 1/2 cup chopped walnuts, or as needed
- Preheat oven to 425 degrees F (220 degrees C). Place tart shells on a baking sheet; sprinkle raisins evenly into the bottom of each tart shell.
- Whisk together butter, brown sugar, maple syrup, vanilla extract, and salt in a bowl; whisk in egg. Pour mixture into tart shells; sprinkle each tart with walnuts.
- Bake in the preheated oven until pastry is light brown and filling is bubbly, about 12 minutes. Cool on a wire rack, about 10 minutes.