In a medium bowl, whip the aquafaba with an electric hand mixer until foamy and stiff peaks form, 2–3 minutes. Add the sugar and whip for another 30 seconds. Finally, add 2 tablespoons of the strawberry powder and whip again for another 30 seconds, until well incorporated.
Add a large spoonful of strawberry jam, if using, to the bottom of a tall glass. Fill the glass ¾ of the way with milk. Spoon the whipped strawberry topping on top and serve, stirring to combine.
Note: To make the freeze-dried strawberry powder, add the strawberries to a food processor or spice grinder and process until finely ground. The strawberry powder will keep in an airtight container for up to 1 month.
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