Preheat oven to 350°F. Line baking sheets with parchment paper. Mix everything except jam in medium bowl until smooth. Batter will be very sticky and wet.
Scoop generous 1 tablespoon dough and place onto cookie sheet, space about 2 inches apart. Using moistened hands, shape dough on sheets to form balls. Press thumb in the middle of each ball to form a well. Place a 1/2 tsp of jam in the center of each ball.
Bake cookies until golden about 10 minutes. Cookies will still be very soft and not set. Leave cookies on sheet to cool and set before removing cookies from sheets.
The nutrition information provided are only estimates based on an online nutritional calculator. This is not a comprehensive list of all the nutrients in the recipe (i.e., does not include vitamins, cholesterol, etc). I am not a certified nutritionist. Please consult a nutritionist or doctor for accurate information and any dietary restrictions and concerns you may have.