These strawberry thumbprint cookies are buttery, tender, and filled with a glossy spoonful of strawberry jam. The dough comes together with just a few pantry ingredients, and the jam bakes right into the center for a bright, fruity bite. They’re perfect for Christmas cookie platters, holiday gift boxes, or anytime you want a simple, classic jam cookie.
Preheat the oven: Preheat oven to 350°F. Line two baking sheets with parchment paper.
Cream the butter and sugar: In a large bowl, beat the softened butter and granulated sugar for 2–3 minutes, until light and fluffy.
Add the egg yolks and vanilla: Beat in the egg yolks one at a time, then mix in the vanilla extract until smooth.
Add the dry ingredients: In a separate bowl, whisk together the flour, cornstarch, and salt. Gradually add the dry ingredients to the butter mixture and mix just until a soft dough forms.
Shape the cookies: Scoop about 1 tablespoon of dough and roll into a ball. Roll each ball lightly in the coarse sugar, then place on the prepared baking sheet about 2 inches apart.
Make the thumbprint: Use your thumb or the back of a small measuring spoon to gently press an indentation into the center of each cookie.
Add the jam: Spoon about ½ teaspoon strawberry jam into each indentation. Avoid overfilling.
Bake: Bake for 11–13 minutes, or until the edges are lightly golden and the cookies are set.
Cool: Let the cookies cool on the baking sheet for 5 minutes, then carefully transfer them to a wire rack to cool completely.
Make the drizzle: In a small bowl, whisk together the confectioners’ sugar and 1 tablespoon milk. Add more milk a little at a time until the glaze is smooth and thick but pourable.
Drizzle and serve: Once the cookies and jam centers are completely cool, drizzle the powdered sugar glaze over the tops. Let the glaze set for 10–15 minutes before serving.
Notes
Use softened butter: The butter should be soft enough to mix easily but not melted, which helps the cookies hold their shape.
Measure flour carefully: Spoon the flour into the measuring cup and level it off to avoid dry, crumbly cookies.
Don’t overmix: Mix just until the dough comes together so the cookies stay tender.
Keep the indent shallow: Press gently so you create a well for the jam without cracking the cookie too much.
Don’t overfill: About ½ teaspoon of jam per cookie is enough; too much can spill over while baking.
Seedless jam works best: It gives the centers a smoother, cleaner look.
Let cookies cool completely before glazing: Warm cookies can cause the powdered sugar drizzle to melt and disappear.
Adjust glaze consistency: Add milk gradually until the glaze is thick enough to drizzle but not runny.
Storage: Keep cookies in an airtight container at room temperature for 3–4 days.
Make ahead: The dough can be prepared and refrigerated for up to 24 hours before shaping and baking.