01 -
In a large bowl, cream the softened butter and granulated sugar until light and fluffy using a hand mixer or stand mixer.
02 -
Gradually add the cake flour or all-purpose flour to the creamed mixture, mixing just until combined to form a soft dough.
03 -
Portion the dough into even pieces and roll into balls. Place on a parchment-lined baking sheet and gently flatten each ball. Refrigerate for at least 30 minutes to firm.
04 -
Preheat the oven to 350°F (175°C). Bake the cookies for 22–25 minutes, or until the edges are pale golden. Cool completely on a wire rack.
05 -
If a thicker filling is preferred, stir 1/2 tablespoon cornstarch into the strawberry jam and heat gently until thickened; cool before using. Spread about 1 teaspoon of jam on the flat side of half the cookies, then top with the remaining cookies to form sandwiches.
06 -
In a small bowl, combine powdered sugar and optional vanilla extract. Dust the assembled cookies generously before serving.