Chop 4 ounces of the white baking bar or chips, set aside.
4 oz White Baking Bark
Make the Cookies
In a standing mixer or bowl with a handheld mixer, beat the butter on medium speed until softened.
1 Cup Butter
Add the sugars and beat until combined.
⅓ Cup Sugar, ⅓ Cup Brown Sugar
Beat in egg yolk and extracts.
1 Egg Yolk, ½ teaspoon Vanilla, ¼ teaspoon Almond Extract
Beat in the flour, cornstarch and salt.
2 ¾ Cup Flour, ½ teaspoon Salt, 2 teaspoons Cornstarch
Scoop cookie dough into 1 Tablespoon-sized balls and roll very well (so that the dough is round and no cracks/seams show).
Place on a wax-paper covered plate or small cookie sheet. Use your thumb or the rounded back of a teaspoon to gently press an indent in the center of the cookie dough. You can do two thumbprints side by side to make a heart if you want. Repeat until all of the dough has been used.
Transfer cookie dough to freezer and chill for 30 minutes.
Meanwhile, place your jam in a small microwave-safe bowl. Heat for 5-10 seconds or until jam is no longer firm and is easy to stir.
½ Cup Seedless Jam
Spoon jam into each thumbprint, filling each indent to the very brim.
Place cookies at least 2" apart on a parchment paper-lined cookie sheet and bake at 375℉ for 9-11 minutes or until edges are just beginning to turn golden brown.
Allow cookies to cool completely. Then transfer to a wire rack to cool.
Prepare the Topping
Melt 4 oz white chocolate over low heat, stirring constantly.
Drizzle each cookie with some of the melted mixture.
Video
Notes
In certain areas, you might need to reduce the flour by 2 Tablespoons so they dough doesn't end up too dry.Store in an airtight container or ziplock bag for up to 3 days at room temperature.