Been making my own homemade mayo (recipe below) for a decade, and I use regular light colored olive oil (not extra virgin, that's too grassy), but any non-seed oil will do, if it's flavorless. Make sure it's not cold, but room temp. Stick blender mayo ---------------------------- 1 whole egg +1 yolk 1 tsp Dijon mustard 1/4 tsp garlic powder 1/2 tsp salt 2 T vinegar or lemon juice 1 cup refined olive oil In a jar whose interior bottom just fits a stick blender head, place egg, add rest. Fit blender head over eggs. Add oil slowly. Blend, pulling up gently