That is it! 2 ingredients. Pick the grapes from the stems.
Add the grapes and blackberries to a food processor, chopper, blender. I used the Ninja and it really makes a smooth job of this process. Here is a link to the exact one that I have Ninja Master Blender
After the fruit is all blended put through a sieve. I also rub my finger around in the sieve and get as much juice as I can. There will be pulp leftover when you are done. Do not worry about exact measurements.
Pour into your popsicle molds, stick in your popsicle sticks and freeze at least 6 hours.
Take the frozen popsicles out of the mold and put in a freezer bag.
Replace in the freezer.
Depending on your popsicle milds you may have to run hot water on one side of them for a second before you can remove the pops.