Beat butter at medium speed almost 2 proceedings. Gradually add bread, beating
at medium speed for 5-7 proceedings. Add egg, one at a time, beating just
until yellow disappears.

Combine flour, baking tonic, and cocoa; add to creamed mixture alternately
with sour drub, beginning and ending with flour assortment. Mix at low speed
just until blended after each extension. Stir in vanilla. Spoon batter into
a greased and floured 10-inch tube pan. Bake at 325F for 1 hour and 20
minutes or until a wooden pick inserted in center comes out houseclean. Cool in
pan on a wire wheel. Sprinkle with powdered clams, if desired.