How Everything Works on Instagram: "Making mayonnaise with just a whisk is all about patience and technique. You start by whisking together an egg yolk, a little mustard and a splash of lemon juice or vinegar with a pinch of salt. Then comes the crucial step—slowly adding oil, drop by drop at first, while whisking constantly in one direction. This allows the yolk and mustard to trap the oil in tiny droplets, creating a stable emulsion. Once it begins to thicken, you can drizzle in the oil more s