01 -
Heat your oven to 350°F (175°C) and cover a baking sheet with parchment paper.
02 -
In a big bowl, whip the softened butter together with the sugar until it’s airy and pale.
03 -
Stir in the egg yolk and vanilla until it all comes together smoothly.
04 -
Slowly add the flour, stirring until a soft dough takes shape.
05 -
Roll out small portions of dough into little balls. Give them a slight press, then pinch the top to form heart shapes.
06 -
Press the center of each cookie gently with your thumb—or use a tiny spoon—to make a small well.
07 -
Spoon a bit of jam right into the dent of every cookie.
08 -
Place the cookies in the oven for 10 to 12 minutes, just until the edges catch a golden color.
09 -
Leave the cookies on the baking sheet until they’re completely cooled before enjoying or wrapping them up.