Flaky French Hard to pronounce Easy to eat

I’ll mend your clothes if torn with holes, I’ll fix a junkies shaky woes. If I’m dropped in a stack of hay, you’ll never find me down below. What am I?

Two tiny friends upon the table, One is white and one is sable. Shake us gently, sprinkle light, We make your dinner taste just right. Though small we are, our flavor's bold, A pinch of us is worth its gold. What are we?

I may last only three minutes, yet live in your head for hours afterwards.

Reddit use a banana as this measuring tool