A kuchen is a German yeast-raised cake filled with fruit or cheese. We’ve simplified the recipe by using baking powder as the rising agent. As with traditional kuchen, this dish can be served for both breakfast or dessert.
Preheat oven to 350° and position oven rack on the center shelf.
To make the dough, sift dry ingredients into the bowl of an electric mixer. Add butter and eggs and mix at medium-high speed until ingredients form a ball, approximately 1 minute. Divide dough into two equal pieces, wrap each in plastic wrap, and chill 30 minutes.
Meanwhile, peel, core, and slice apples into ¼-inch pieces. Add ¼ cup sugar and lemon juice and stir. Press one ball of dough into a 10-inch deep-dish pie plate. Cover with the apple mixture. Top the apple mixture with small dabs of jam. Divide the remaining dough into 10 equal-size balls and distribute evenly on top of apples. Sprinkle with the remaining 1 teaspoon sugar and cinnamon. Bake 40 minutes, or until dough is golden brown. Remove to a cooling rack. Serve with a dollop of sweetened whipped cream and garnish with cinnamon-sugar, if desired.