Date Turnovers

1 . Stage

Heat dates, water, and 1/4 cup brown sugar in a saucepan over medium heat; cook, stirring occasionally, until dates are very soft, about 5 minutes. Set aside to cool to room temperature.

2 . Stage

Stir together milk and vinegar in a small bowl; set aside to curdle, about 10 minutes.

3 . Stage

Whisk together flour and baking soda in a large bowl; stir in oats and remaining 1 1/2 cups brown sugar. Stir in melted butter, melted shortening, and curdled milk mixture until well combined; cover dough and refrigerate until firm, about 1 hour.

4 . Stage

Preheat the oven to 350 degrees F (175 degrees C). Line baking sheets with parchment paper.

5 . Stage

Roll dough out on a lightly floured surface, about 1/8-inch thick. Cut out dough circles with a round cookie cutter. Place about 1 tablespoon date mixture in the center of each circle; fold in half and press edges together tightly to seal. Place cookies on the prepared baking sheets.

6 . Stage

Bake in the preheated oven until golden, about 10 minutes. Remove to cool completely on a wire rack.