First, I am curious what you have used in other foundations. This sounds very dark to me.
Since you use mostly Ebony color in your mix, I would buy an Ebony Starter Kit for foundation. Then from there, you can just buy pouches of the colors including white as you need them.
To upscale your recipe, just use a bigger spoon. You might still need your small spoon to get it right. And it does involve a little math.
Most people can get a 1/4tsp from measuring spoons used in the kitchen. The small spoon we send in the kits is a 1/32, a 1/4 tsp is equal to 8 of those.
The capacity of a large jar (30 gram) is about 100ish small spoons.
Your recipe is 24 spoons total in volume, but to give room for mixing, I would only do a multiple of 3. 3(20white, 2Ebony, 1Peach, 1WG)
You need 60white, 6Ebony, 3Peach, 3Warm Gold. The colors will need to be measured with the small spoon, but for the white, you can do 7 scoops with a 1/4 tsp (7*8 =56) and then add in 4 small scoops of white.
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Lips: Maiden & Nectar
Eyes: Phantom, Linen, & Fusion + Tarnish
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