chocolate milk is good for the insulin spike, but the buns? are you trying to pack on as much weight as possible?
It's all about getting in simple carbs with as little fat intake as possible. The majority of my carbs come from complex carbs pre-workout, Gatorade during my workout, and more simple carbs post workout (I often eat sugary cereal). Post workout you're glycogen depleted, you're just shuttling glycogen to muscle at that point. This all comes from Dr Mike Israetel.
I get in anywhere from 250-370 grams of carbs a day, it's all based on how much volume I do for that day. By confining my carbs to around my workout, I've gained 9 pounds in 2.5 months. Which for me, as an advanced lifter, is right where I want to be.
Meal 1- Carbs from yogurt or fruit
Meal 2 (Pre-workout meal)- Carbs from brown rice/fruit/avocado plus additional veggies
Workout meal - Gatorade
Post Work out - Chocolate milk and whatever else
Meal 3 - Carbs from veggies