Combine all the ingredients, mixing well to blend. Cover and refrigerate until ready to use.
Flour Mix
Combine all ingredients and mix well. Heat deep fryer between 375 to 400 degrees F.
Batter
Combine, flour and seasonings until well blended; add beer mixing well.
Cut about 3/4 inch off top of onion and peel. Cut into onion 12 to 16 vertical wedges but do not cut through bottom root end. Remove about 1 inch of petals from center of onion. Separate the onion petals just slightly, too much will destroy the onion. Dip onion into seasoned flour removing excess by shaking. Separate petals to coat thoroughly with batter. Dip into batter. Dip into flour mixture again.
Very gently place in fryer basket and deep-fry for 1 1/2 minutes. Turn over, and fry an additional 1 1/2 minutes.
Drain on paper towels.
Place onion upright in shallow bowl and remove center core with circular cutter or apple corer.