Mix 1 1/2 cups white flour and rye flour. Heat beer, honey and margarine until warm. Dissolve yeast in warm water in large warm bowl. Add warm beer mixture, caraway seed, salt, garlic powder and 1 1/2 cups flour mixture. Beat until smooth.
Stir in remaining flour mixture and enough additional white flour to make a soft dough. On floured board, knead until smooth, about 4 minutes. Shape into a ball. Place in a greased 8-inch round pan, turning to grease top. Flatten to fit pan. Cover. Let rise in warm draft-free place 45 minutes. Bake at 375 degrees for 25 to 30 minutes or until done. Remove from pan. Brush with additional margarine if desired.