01 -
Line a square metal 8×8 baking pan with parchment paper to hang over all sides. Preheat the oven to 190°C.
02 -
In a stand mixer, cream the butter and granulated sugar for 3 minutes until light and fluffy. Scrape down the mixing bowl.
03 -
Mix in the eggs and vanilla extract until just combined. Scrape down the bowl again.
04 -
Mix in the flour, salt, and baking soda until the dough starts to form. Chill the dough in the refrigerator for 20 minutes.
05 -
Press half of the cookie dough evenly into the prepared baking pan.
06 -
Lift the parchment paper with the first dough layer out of the pan and place it onto a baking sheet. Transfer to the freezer.
07 -
Replace the parchment paper in the pan and press the remaining cookie dough evenly into it.
08 -
Spread the strawberry preserves evenly over the cookie dough in the pan.
09 -
Retrieve the first dough layer from the freezer. Peel off the parchment, place it on top of the preserves, and press gently to secure.
10 -
Bake the cookie bars in the oven for 25-28 minutes or until the top is golden brown. Cool completely on a wire cooling rack.
11 -
Turn the cooled bars upside down so the bottom becomes the top. Whisk together powdered sugar, milk, and vanilla extract until smooth.
12 -
Pour the glaze over the bars and decorate with rainbow sprinkles. Let sit for 1-2 hours at room temperature until the glaze is set.
13 -
Cut the bars into 15 pieces and enjoy.