Fill a tall glass with ice. Pour in your iced coffee or cold brew. Let the espresso cool for a few minutes before pouring it over ice.
In a small bowl or mason jar, combine heavy cream, whole milk, strawberry syrup, strawberry puree (if using), vanilla extract, and powdered sugar (if needed). Stir gently before you froth.
Use a handheld frother to blend for 20 to 30 seconds until it thickens and looks fluffy. It should be pourable but thick enough to stay on top. If using a mason jar, seal it and shake hard for 30 to 45 seconds. You can also use a French press by pumping the plunger about 20 times.
Slowly pour or spoon the pink strawberry cold foam over the iced coffee. Pour it over the back of a spoon to help it float on top.
Enjoy this drink fresh. Sip through the foam to mix the cold coffee and sweet strawberry foam with each sip.