Preheat oven to 350°F. In a small bowl, combine all ingredients except sprinkles and mix until a smooth batter forms. Stir in half of the sprinkles.
Carefully scoop the dough onto a baking sheet lined with parchment paper (remember to leave plenty of room from the edges of the baking sheet as the cookie spread a lot during baking). Dough will be very sticky. Try your best to get it as one lump onto the baking sheet. Then wash your hands, do a quick dry, and then shape the cookie. With your hands clean and slightly moistened it should be much easier to shape the cookie to resemble a round disc. Slowly add the remaining sprinkles on top.
Bake for about 10 minutes, or until edges turn a golden brown and the middle is set but still soft. Let cookie cool for a few minutes before attempting to remove from cookie sheet. Cookie is best eaten while warm.
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.