Sift flour, baking powder, and salt into bowl. Set aside. Cream butter at high speed, until fluffy, about 2 minutes. Add sugar, egg yolks and vanilla. Beat until sugar is dissolved and mixture is light, about 4 minutes. Mix in flour, slow speed, until dough begins to come together, about 1 minute.
Turn dough onto lightly floured surface. Bring together with your hands. Do not knead. Dough will be tough if kneaded. Divide dough into half and form 2 balls. Wrap in plastic wrap. Freeze for at least 30 minutes or up to 3 hours.
Heat oven 350. Grease 10" springform pan with butter. Remove 1 ball of dough, unwrap and grate into pan. Gently pat dough to even it out in bottom of pan. Spread jam over top evenly, leaving 1/2" border around edge. Remove 2nd ball of dough and grate over layer of jam. Pat dough over jam.
Bake on center rack of oven for 25-30 minutes, until light golden brown. Let cool in pan on rack. Cut into wedges.
Can be topped with fresh berries and whippped cream.
Not a NESTLÉ®-tested recipe.