In a food processor mix 8 oz. dates, 1/2 cup vegan butter, 1/2 cup dark cocoa powder, and 1/2 cup oat milk. Try to get it as smooth as you can.
Preheat oven to 350 degrees.
Move the mixture into a large bowl, using a spatula to scrape it all out.
Add to the mixture: 1 tsp vanilla, 1 cup flour, 1 tbsp corn starch, 1/2 cup oat milk, 1/3 cup sugar, and 1/2 tsp baking soda. Mix well using a hand mixer if you have one.
Gently stir in the cherries. If you want to get cherries in nearly every bite, you can use up to 2 cups of them.