Simple but so delicious, these buttery Jam Thumbprint Cookies are filled with your favorite jam or preserves, such as apricot and raspberry. Garnish with a glaze or powdered sugar for a festive treat.
Preheat oven to 375-f degrees. Line a baking sheet with parchment paper.
In a large bowl of a stand mixer, combine the butter and sugar and mix on medium-high speed using the paddle attachment for 2-3 minutes until light and fluffy.
Mix in the egg yolk and vanilla, scraping down the sides and bottom of the bowl as needed.
Add the flour, cornstarch, and salt and mix again until everything comes together making sure to scrape down the sides of the bowl as needed.
Shape the dough into 1-tablespoon size balls and arrange 2 inches apart on the prepared parchment lined baking sheet. Gently press in the center of each cookie with your thumb or the back of a 1/2 teaspoon measuring spoon to create an indent. If you prefer, you can pinch any cracks together at this point.
Fill with apricot or raspberry jam, warming the jam first for about 10 seconds so it is a bit thinner.
Bake for 9-11 minutes until set and just barely starting to turn golden around the bottom edges. Remove from the oven and cool.
When ready to garnish, there are two easy options. Dusting with powdered sugar as shown, or to prepare a basic powdered sugar glaze.
Prepare the glaze by whisking together the powdered sugar, milk or cream, and vanilla in a medium bowl. Transfer to a Ziplock bag and snip off one small corner. Drizzle the glaze over cookies, then let set for 1-2 hours until the glaze has set up.
Notes
Recipe from House of Nash Eats. Nutritional value assumes all icing is used as garnish.