To answer this question, we must know the density of the vanilla powder.
The density varies from 0.62 to 0.72 g/mL, depending on how the powder is made. I will assume that the density is 0.67 g/mL.
I also assume that you are using US cups. 1 US cup = 237 mL
If you are using ⅔ cup of vanilla powder, Its mass will be
⅔ cup ×
That is way too much vanilla powder, unless you are a real vanilla addict.
To get 32 g of vanilla powder, you should use
32 g ×
This is less than the smallest measuring cups (⅓ cup) that are commonly available.
Let's look at a different measure: 1 tbsp = 14.8 mL
48 mL ×
You should be OK if you use 3 tbsp of vanilla powder.
If that's not enough, just add a little more "to taste".