Beat butter at medium speed till creamy add almond paste and beat additional minute add sugar a little at a time while beating till all is incorporated about 5 minutes. Being sure to scrape sides of bowl while mixing. Add eggs 1 at a time beating just until blended.
Combine flour, baking powder and salt in a bowl.
Add flour to batter alternating with sour cream till just blended in on low speed.
Pour into pan and bake in lower third of oven for 65 minutes or until a toothpick inserted comes out clean. Let cool on wire rack till pan is cool enough to handle, remove from pan and cool on wire rack. Serve as is or top with Almond glaze.
Glaze: Mix sugar with a little liquor at a time till a soft smooth consistency.