Preheat the oven to 350°F. Line a baking sheet with parchment paper.
Mix all the ingredients in a bowl until a dough forms.
Scoop 1-inch balls of dough onto the prepared baking sheet. Arrange the balls of dough about 1 1/2 inches apart. Use your thumb to create a thumbprint in the middle of each cookie. Add 1 teaspoon of jam to the indentation.
Bake the cookies for 8 to 10 minutes, until they start to turn light golden brown on top.
Remove the cookies from the oven and cool them on the pan for 10 minutes. Transfer them to a rack to cool completely before serving.