Add the butter and sugar to a large mixing bowl and mix on high until light and fluffy. This will take about 3-4 minutes. Add in the egg yolks and vanilla extract and mix on high for a minute. Add the flour and stir in until combined.
Form the dough into a ball, wrap in plastic wrap and chill for about 1/2 hour.
Line a baking tray with parchment paper and make about 36 balls with your dough. Place them evenly spaced out on your baking tray (in batches) and use your thumb to make an impression in the middle of each ball. .
Fill each middle with about 1/2 teaspoon of the partrideberry jam.
Bake in a preheated 350 degree F/180 degrees C oven for about 12 minutes. Remove from oven and let cool. These cookies can be stored in an airtight container for about 5 days.
*A note on times provided: appliances vary, any prep and/or cook times provided are estimates only.
Notes
Chill the dough - If you don't chill your dough, the cookies will spread out when baked and you won't end up with a thumbprint cookie. So, chill that dough. This cookie dough can be made in advance and even frozen. I've made it the day before using before, but just and hour is fine.
Weigh cookie dough balls - To keep things neat, you can weigh out your cookie balls. I'm pretty sure they were about 15 grams each. Then I rolled them into neat little balls, like you see below. For a regular sized baking tray, you should be able to get 15 cookies on the sheet at one time.
Watch bake time - All ovens bake differently, these baked at exactly 12 minutes in my oven.
Nutrition Facts
Partriedgeberry Jam Thumbprint Cookies
Amount Per Serving (1 cookie)
Calories 98Calories from Fat 45
% Daily Value*
Fat 5g8%
Saturated Fat 3g19%
Cholesterol 24mg8%
Sodium 47mg2%
Potassium 14mg0%
Carbohydrates 11g4%
Fiber 1g4%
Sugar 5g6%
Protein 1g2%
Vitamin A 172IU3%
Vitamin C 1mg1%
Calcium 5mg1%
Iron 1mg6%
* Percent Daily Values are based on a 2000 calorie diet.