Try cutting the brownies into 6 pieces. Eat one piece and give it 90 minutes to 2 hours to kick in. If the 1/6 of a brownie isn’t enough just increase the amount to reach what you are expecting.
Hope this helps. Edibles are strong and have to be eaten with care!
Yeah, defdinantely need to take smaller portions. Maybe cut each one into 3rds, an see how that works. Always remember less is more with edibles. You can always eat a little more, but you can never eat less