Whisk together the eggs, oil, and sugar until fully combined. Pour in the vanilla and vinegar, and whisk again.
To the same bowl, pour in the buttermilk and whisk until incorporated and the mix is a pale yellow.
Add the drops of pink coloring and whisk until the batter becomes a barbie pink. To the bowl, add in the flour, baking powder, cocoa powder and whisk until just combined.
Prep a waffle iron by heating and greasing with nonstick spray. Ladle a half scoop into a pre-heated waffle iron, cook until the waffle indicator light comes on, or cook for two minutes.
Repeat until all batter is used and top with syrup and/or whipped cream.
Notes
Do not over-mix - we talked about swapping to a spatula from a whisk, and doing so helps you limit the over-mixing. Over-mixing will overwork the gluten in the recipe, causing a dull, dense texture.Use active baking powder - believe it or not, baking powder (and soda) do in fact have a shelf life. Baking powder, if mixed with boiling hot water, should foam. If it does, it's good to use! If not, it's "dead" and needs replacing.Let the batter sit - giving the batter time to sit actually helps with the fluff factor. It allows all the rising agents and other ingredients marry together before being used.