1 Start by making the caramel topping. Take brown sugar and butter and combine and melt in a saucepan on medium heat until sugar dissolves and the mixture is bubbly, this should take several minutes. (After sugar melts, don't stir.) Pour mixture into a 10 inch diameter stick-free cake pan with 2 inch high sides. Arrange pineapple slices in a single layer ontop of the caramel mixture.
2 Preheat oven to 325 degrees F. Whisk the flours, almonds, baking powder, and salt in a large mixing bowl. In a separate bowl, use an electric mixer to beat the sugar and butter together until light. Add eggs one at a time, beating after each addition. Beat in the vanilla. Add dry ingredients alternately with sour cream in 2 additions each, beating well after each addition. Pour cake batter over caramel and pineapple in pan.
3 Bake cake until tester inserted into the center comes out clean, about 1 hour to 1 hour 15 minutes. Cool
at 9:32 PM on Nov. 14, 2010