While Dutch Bros customers appreciate the quality drinks that they enjoy when they visit this chain, its ingredients generally don't match the rigorous standards of Starbucks. Both Starbucks and Dutch Bros offer food and snacks, but Starbucks has a better variety.
If you're looking for a number, I would say start with 6-8 tablespoons of syrup. So if you use a combination of 4 syrups that's 2 tablespoons each, and if you use 2 syrups that's 4 tablespoons each. The Rebel is a cold drink, so you'll need some ice.