I was going to say Eminem but I was beaten.
I think thats just called a wigger. No food metaphors that I’ve heard.
Twinkie - yellow on the outside, white on the inside.
Oreo/coconut - black on the outside, white on the inside
Apple - red on the outside, white on the inside
To my knowledge, I don’t think these food metaphors go in the opposite direction. We just have terms for them like weeaboo, wigger, etwc.