Bake your brownies in greased mini-muffin tins filled up 3/4 of the way. You’re going to have to shorten the baking time a bit, so just keep your eyes on them as they bake — they’re done when a cake tester comes out clean.
Ask the brownies are baking and cooling, put together your frosting and dye it green.
Once baked and cooled, secure the strawberries to the brownies with a dab of frosting
Put frosting in a piping bag fit with a small star tip, and cover the entire strawberry by starting at the strawberry, applying a bit of pressure, and pulling away gently to a nice point.