Preheat your oven and line a baking pan with parchment paper.

In a mixing bowl, cream together the softened butter, granulated sugar, and brown sugar until light and fluffy.

Add the egg, vanilla extract, and almond extract. Mix until smooth.

Fold in the flour, cornstarch, baking powder, and salt until a soft dough forms.

Press the dough evenly into the prepared pan.

Bake until the edges are set but the center still looks slightly soft—this keeps the bars tender.

Allow the bars to cool completely before frosting.

To make the frosting, beat the butter and powdered sugar until fluffy.

Add vanilla and cold heavy cream, whipping again until smooth and airy.

Spread frosting over the cooled bars, top with festive sprinkles, chill to set, slice, and enjoy!