In the clip, the actress can be seeing blending apple cider with about one shot of Aperol before adding soda water, which amusingly explodes when she opens the bottle (been there).
While she's cleaning up, she gives the drink a good stir with a bar spoon before topping her concoction with a splash of prosecco and garnishing with thin apple slice, and, perhaps most importantly, doing a little dance while enjoying the first sip.
WATCH: Reese Witherspoon's 4-Ingredient Cocktail Recipe Below
While the drink, which Witherspoon called her "Fizzy Apple Cider cocktail" in the caption, has been billed as more of an autumn elixir by the star herself, we'd argue it's quite suitable for any season.
And as Witherspoon herself said, it "pairs well with just about any dance move".
We'll drink to that!