Sift together flour, baking powder, and salt. Set aside.
Beat butter in a separate bowl, then add sugar a little at a time. Add vanilla and beat mixture until it is nice and fluffy. Beat in egg. Stir in flour mixture alternately with milk.
Chill dough in the refrigerator for at least 2 hours, or overnight.
To make turnovers: Preheat the oven to 350 degrees F (175 degrees C).
Roll dough out to 1/4 inch thickness on a lightly floured surface. Cut into 3 inch squares. Spoon about 2 teaspoons of pie filling into the center of each square and fold over to form a triangle. Pinch seams to seal or press with the tines of a fork. Place at least 2 inches apart on a greased baking sheet. Brush with egg white.
Bake for 12 to 15 minutes in the preheated oven, or until golden brown on the top and bottom.
Cajun Sweet Dough · Dinner Match Lab | Dinner Match Lab