01 -
Pulse cold butter and shortening into the flour, brown sugar, and salt using a food processor until mixture resembles coarse crumbs with pea-sized pieces.
02 -
Sprinkle ice water evenly over the mixture and use a fork to gently combine until dough just comes together. Avoid overworking.
03 -
Divide dough into two discs, wrap in plastic wrap, and refrigerate for 30 minutes.
04 -
Roll dough out on a lightly floured surface to approximately 4 millimetres thickness. Cut rounds with a 10-centimetre cutter and fit into muffin tins. Chill shells while preparing filling.
05 -
Combine brown sugar, corn syrup, melted butter, egg, vanilla extract, and salt in a bowl. Whisk until smooth and homogenous.
06 -
Scatter raisins (or chosen variation) onto the bottom of each chilled pastry shell. Pour filling mixture into shells, filling each two-thirds full.
07 -
Place muffin tin on the oven's lowest rack. Bake at 220°C for 12–15 minutes until filling is set and pastry is golden.
08 -
Allow tarts to cool completely on a wire rack before removing from pans.