Jam-Filled Cookies (Print Version)

# Ingredients:

01 - 1/3 cup (105g) jam or preserves, your choice of flavor.
02 - 1/2 cup granulated sugar for coating (optional).
03 - 1/2 teaspoon salt for balance.
04 - 2 teaspoons cornstarch for structure.
05 - 3/4 teaspoon vanilla extract for flavor.
06 - 1 large egg yolk, room temp.
07 - 1/3 cup (70g) packed light brown sugar.
08 - 1/3 cup (70g) white sugar.
09 - 1 cup (226g) room-temp unsalted butter.
10 - 2 1/4 cups (280g) plain flour.

# Instructions:

01 - Use a mixer (stand or handheld) to whip butter until light and fluffy.
02 - Blend the sugars into the whipped butter. Scrape the bowl if needed, and mix until smooth. This should take less than a minute.
03 - Beat in the vanilla and the egg yolk until fully incorporated.
04 - Mix salt, flour, and cornstarch in a different bowl. Slowly add it to the wet mix; dough will be crumbly but should hold together.
05 - Grab about a tablespoon of dough, roll it into a ball, and smooth it out. Coat in sugar (if you want), then use your thumb or a small spoon to press a dent into the middle.
06 - Pop the cookie balls in the freezer and leave them to firm up for 30 minutes.
07 - Set the oven to 375°F (190°C). Warm up the jam a little so it's easier to spoon. Fill the indentations in the cookie dough with it.
08 - Spread cookies on a parchment-covered baking sheet, leaving 2 inches between each. Bake at 375°F for about 11 minutes or until the edges turn golden.

# Notes:

01 - Make the dough balls smooth to keep them from cracking.
02 - You can pick any jam or preserves you like.
03 - Leave cookies on the tray until they're completely cooled.