I spotted this photo over on SeriousEats a couple weeks ago, which led me to the website of Lottie and Doof, and her attempt to remake a cookie from Dorie Greenspan's cookie bar this past summer called 'jammers.'
Recipe: (adapted lightly from Lottie and Doof, which was adapted from Dorie Greenspan)
2 sticks (1 cup) butter or margarine, softened
1/2 cup sugar
1/4 cup confectioners’ sugar
1/2 teaspoon salt
2 large egg yolks
1 teaspoon vanilla
2 cups flour
3 tablespoons butter or margarine
1/2 cup flour
1/4 cup light brown sugar
1 tablespoon granulated sugar
1/4 teaspoon salt
1/2 teaspoon ground cinnamon
Beat the butter, sugars and salt together until light and fluffy.
Add in the egg yolks and vanilla and beat until smooth. Mix in the flour until just combined.
Pull the dough out of the bowl, knead in any remaining flour streaks gently, wrap in plastic wrap and chill for 30 minutes.
For the streusel, melt the butter, then add the flour, sugars, salt and cinnamon and stir with a fork until crumbly. Set aside.
Divide the dough between small ramekins, muffin cups, or ring molds, I used 2" individual baking cups and pressed the dough in to the bottom, you can also roll out the dough and cut circles to fit in the base of your dishes. You are aiming for about a 1/2" thick base.
Top the base with 1-2 teaspoons oft eh jam of your choice and sprinkle with the streusel.
Bake on 350 F for 18 to 22 minutes until golden brown.
Cool for 15 to 20 minutes before removing from the molds and cooling completely.