First, line an 8×8 or 9×9 pan with parchment paper and secure it with binder clips. This ensures the dough doesn’t stick and makes it easy to lift the bars out once baked.
In a medium bowl, whisk together flour, baking powder, cornstarch, and salt. This keeps the bars light and tender while distributing leavening evenly.
Using a stand mixer, beat the softened butter and granulated sugar on medium-high speed until fluffy, about 2-3 minutes. This step is key for soft, airy bars.
Mix in the egg until fully incorporated, then add almond extract. Scrape down the sides with a spatula to make sure everything combines evenly.
On low speed, gradually add your dry ingredients to the wet mixture. Mix just until combined—overmixing will make the bars tough.
Transfer the dough to your prepared pan and press it evenly with your hands or a spatula. Make sure the corners are filled and the top is smooth.
Bake at 350°F (175°C) for 20-25 minutes until edges are lightly golden. The center may look slightly underbaked, but it will firm up as it cools.
Beat softened cream cheese until smooth, then add butter and mix until creamy. Gradually add powdered sugar, vanilla, salt, and cream until you reach the desired consistency.
Once bars are completely cooled, spread frosting evenly over the top and sprinkle with festive pink and red sprinkles. Chill for sharper cuts before slicing into squares.