Recipe(tried): Make ahead instant oatmeal mix

By trial & error I finally kept this recipe and have been using it for a year. Grandchildren love it and I even use it for get-well gifts, using decorative jars for the contents.
Instant Oatmeal Mix

4 cups regualr or old-0fashioned oats
2 teaspoons cinnamon
1 cup (packed ) brown sugar
1/2 cup or more, dried fruit ( raisins, cranberries, apples or bananas )
1/2 cup or more, pecans or walnuts
1 cup instant powdered dry milk
Dash of salt
1 or 2 teaspoons vanilla powder, if desired
Put all ingredients in food processor and grind together to desired coarseness.
For Serving: Add 1/2 cup oatmeal mix to a microwable bowl or mug; add 1 cup of cold water and stir. Micro for 2-1/2 minutes or more ( depending on your micro wave wattage ) If it comes to a boil. Take out of micro and stir. Let set 3 or 4 minutes to thicken & cool slightly. Add pat of butter, if desired, but not necessary.