01 -
Place flour, powdered sugar, and vanilla sugar into a large mixing bowl and blend to combine.
02 -
Add the egg, softened butter, and a small amount of pink food coloring paste. Knead by hand or using a mixer with a dough hook until a smooth, uniform dough forms.
03 -
Shape dough into a disc, wrap tightly in plastic wrap, and refrigerate for about 30 minutes.
04 -
Preheat oven to 320°F (convection/fan). Line three baking trays with parchment paper.
05 -
Lightly flour the work surface and rolling pin. Roll dough evenly to about 1/8 inch thickness.
06 -
Using Linzer cookie cutters, cut equal numbers of solid and heart-windowed cookies. Transfer to prepared baking trays.
07 -
Bake one tray at a time in the center of the oven for about 8 minutes, until set but not browned.
08 -
Remove from oven and allow cookies to cool fully on trays or wire racks.
09 -
Warm the red jelly gently in the microwave until it is smooth and spreadable.
10 -
Brush the base of each solid cookie with a thin layer of jelly, then top with a heart-cutout cookie.
11 -
Spoon or pipe remaining jelly into the heart-shaped centers.
12 -
Allow cookies to set, then store in airtight tins to preserve freshness.