Sift together flour, baking powder, baking soda, and salt. Cream butter with sugar until fluffy. Beat in eggs. Puree bananas, sour cream and vanilla. Alternate add dry ingredients in 3 additions and banana mixture in 2 additions to the egg mixture. Beat enough to incorporate. Fold in raspberries and toasted almonds. Spoon into greased muffin tins and bake in a preheated 350 deg F oven for about 25 minutes, until puffed, browned and springy. Makes about 15 muffins.