The phrase "cup vanilla" refers to a measurement unit of vanilla extract used in cooking or baking. It means you need to use a cup-sized amount or quantity of vanilla extract in a recipe. Full definition
The recipe said to use 1/2 cup, but I stuck with what I'd done in BC and used 1/4 cup butter and 1/8 cup vanilla yogurt. (bakingadventuresinamessykitchen.com)
Combine 1 scoop of cinnamon bun whey protein, 1/4 cup diced cooked sweet potato, 1 cup of ice, and 1 cup vanilla almond milk in the blender. (nupush.net)
I used 1/2 cup flour (1/4 cup coconut flour, 1/4 cup vanilla protein powder). (raiasrecipes.com)