Assemble - Remove vanilla ice cream and blueberry frozen yogurt from freezer to soften (takes about 15-20 minutes). When ready, scoop around 2 cups of vanilla ice cream over the cookie crust and spread evenly using an offset spatula.
To make the blueberry powder, pulverize the freeze dried blueberries using a food processor, mortar and pestle, or plastic bag and rolling pin. We want the powder to be fine. Around 1 ounce of freeze dried blueberries will yield 3 tablespoons of powder.
***To ensure even layers of the ice cream, place the pan back in the freezer for about 10 minutes after adding each layer.