These classic Raspberry Thumbprint Cookies combine the buttery goodness of shortbread cookies with the sweet tanginess of raspberry preserves, creating a delightful treat that's perfect for your cookie exchange or as a festive addition to your holiday platter.
Add the butter and sugar to a large bowl or the bowl of a stand mixer and cream until light and fluffy. (Alternatively, you can use an electric mixer and beat everything together in a large bowl.) Beat in the egg, oil, and vanilla, scraping down the sides of the bowl as you go.
In a separate bowl, combine the flour, cornstarch, baking powder, and salt. Slowly add the flour mixture to the butter mixture and mix until combined.
Wrap the dough in plastic wrap and chill for at least 1 hour (or overnight) in the refrigerator to make the dough easier to handle, and to help prevent the cookies from spreading.
Roll the dough into 1-inch balls, making sure to make the balls smooth, and place on a parchment-lined sheet pan, about 2 inches apart. (Try to make the dough balls as evenly sized as possible to avoid any cookies from being over or undercooked.)
Using a small measuring spoon, make a circular indentation in the center of each cookie.
Add ¼ teaspoon of raspberry jam or preserves to each cookie.
Bake the cookies for 8-10 minutes at 350 degrees F, or until the edges of the cookies are lightly browned. Allow to cool for 5 minutes on the cookie sheet, then transfer to a cooling rack to cook completely.
Notes
For best results, chill the dough for at least 1 hour prior to forming the dough balls and baking.
Mix it up by trying out different flavors of jam or fillings.
Don't skip the cornstarch - it will help tremendously in preventing these cookies from spreading while baking.