Preheat the
oven to 350F. Grease and line two 7 inch round cake pans with parchment
or wax paper. Sift together the flour, baking powder, and salt. In a
separate bowl, beat the sugar and butter until light and fluffy. Add the
eggs one at a time, adding 1 tablespoon of the flour mixture after each.
Beat well after each addition. Mix in the remaining flour and beat
thoroughly. Then stir in the coffee and walnuts. Turn into the prepared
cake pans and bake for 35-40 minutes, until lightly browned.
Remove from
the oven and leave in the pans for a few minutes. Then turn out onto a
wire rack to cool completely. To make the filling, beat together the
confectioner's sugar, butter, and Kahlua until very smooth. Then
sandwich the two layers together with the filling, frost, and decorate
with the walnut halves.
A rich, sweet
layer cake, iced and filled with coffee frosting, is accented with nuts.