ALRIGHT, HERES WHAT YOU NEED TO KNOW ABOUT A VENTI… If you’re wanting to convert a previous recipe or a future recipe here are the changes you need to know.. Ask for it in a Venti size rather than grande. Ask for 1-2 extra pumps of sugar free sweetener. THATS IT – keep everything else the same. If you don’t like the taste.. Add another pump of the normal flavor syrup (usually around 6gC)