In mixer or by hand beat sugar and butterCrisco until smooth and lemon coloredAdd
egg
yolk
one at a time add sour cream optional
add
flour
fold in egg white do not overbeat only beat
for
about
1
minute
Cook in cake pan that has been wiped
with
small amount of Crisco or floured line with wax paper
bake
1
hour at 350 or until toothpick comes out clean cool on rack about 10 minutes covered with clean dish towel Remove and allow to cool completely covered with towel