I did these for a while, but stopped because I didn't have a plethora of eggs around (I'd rather eat them than put them in my hair ).

My recipe, if I remember correctly, was

one whole egg, beaten
1/2-1 tbs ACV
2 tbs oil (sunflower/coconut/olive)

I really liked how it made my hair feel, but the extra work in whipping it up, using eggs, and thorough rinsing process made me stop.