Mix cheeses and seasonings together fold in crab. Stuff blossoms with the mixture, dividing equally. Fold ends of blossom to cover filling.
Mix flours and spices add to club soda. Whisk lightly to incorporate. Lumps are better than over mixing. Whisk egg white until foamy. Add to batter.
Dip blossom. Fry in deep skillet with oil at 350 degrees. Fry 3 minutes per side. Drain on paper towel. Serve with olive oil, fresh lemon, fresh grated cheese or fresh tomato sauce.