Crispy Fried Onion Rings
For a very simple, relatively thin tempura batter, I've got a really easy recipe. Combine 1 cup rice flour with 1 egg plus enough water to make 1 cup. Dip, fry, enjoy. I usually make a simple dipping sauce out of soy, rice vinegar, and fresh ginger.
The key is that the oil be hot enough. You gotta let it heat up longer than you think. If you've got a thermometer, you want 350-375.
His works great however you don't HAVE to use ground up rice. The buttermilk works great but use regular milk if you don't have buttermilk. You can buy rice flout which works great but so does plain ols AP flour. The secret, HOT grease, 375F. The other secret, small batches. If the grease isn't hot enough you'll get limp, greasy rings. Put in too many and you'll lower the oil temp, same reslut.