I pinched this recipe from Odense Almond Paste and it came out delicious, so I am sharing it with you. I have been searching for an almond paste coffee cake recipe since I started cooking/baking (many years now). It's very close to an almond ring my mom bought from a neighborhood bakery, when I was very young.
1 10-12 cup bundt pan, greased and floured. Sprinkle sliced almonds on bottom of bundt pan, set aside. Preheat oven to 350 degrees.
Mix grated almond paste, 1/2 cup almonds, brown sugar and cinnamon together. Set aside.
In mixing bowl, combine sugar and butter. Beat on high speed for 2 minutes. Add eggs and extract. Beat until batter is light and fluffy, about 3 minutes.
Sift flour with baking powder, baking soda and salt. Add flour mixture and sour cream to egg mixture. Beat until combined.
Spoon 1/3 of batter into bundt pan. Sprinkle 1/2 of filling on top. Spoon 1/3 batter on filling. Top with remaining filling. Cover filling with remaining batter.
Bake 45-50 minutes or until toothpick inserted near middle of cake comes out clean. Cool in pan on wire rack for 15 minutes. Unmold carefully onto wire rack and cool completely. Garnish with powdered sugar or almond icing.