Put mango and 3/4 cup milk in the blender and mix well.
Pour into popsicle molds about 1/3 of the way up and put in the freezer for about 30 minutes. This will prevent the layers from mixing.
Add Greek yogurt, sweetener and a dash of milk to blender. Mix well. If it's too thick to pour add a bit more milk until you get desired consistency.
Remove popsicles from the freezer and add yogurt layer. Put back in freezer for about 30 minutes.
Remove from freezer and add remaining mango layer. Freeze again for several hours. To unmold run the bottom of the mold under warm water - NOT hot. If it's too hot the popsicles will melt.