Boterkoek / Dutch Butter Cake Recipe

1. Preheat the oven to 400°F. Place a 9-inch tart pan (ideally with a removable bottom) or springform pan on a rimmed baking sheet and set aside.
2. In a large mixing bowl or the bowl of a stand mixer, combine the flour, sugar, and salt. Add the butter in chunks and mix until the mixture is sandy and no large lumps remain.
3. Set aside 1 tablespoon of the whisked egg. Add the remaining egg to the dough and mix until it just comes together.
4. Press half of the dough into the bottom of the pan and partway up the sides. Add the jam and spread in a thin layer, leaving 1 inch free around the edge.
5. Press the remaining dough onto the filling and press the edges down to seal (it can help to pat the dough into a round before placing it on top of the jam); don't worry if some of
6. the jam peeks out of the top. Brush the top of the dough with the reserved egg. Use a fork to make a lattice pattern on
7. top of the dough. If you like, place a small dollop of jam on the center of the cake (this can be helpful if you're making multiple cakes and want to remember what each is filled with).
8. Bake until the edges and top of the cake are golden brown, 20-25 minutes. If the top is getting too dark, cover loosely with foil. Remove from the oven and cool completely in the pan. Cut into 16 wedges to serve.

Note: Cake can be made up to 3 days ahead and kept at room temperature.