Clean and prep the shrimp and onion.
Mince the garlic.
Heat butter and olive oil in a pan, then sauté the garlic, onion, and shrimp.
Once the shrimp are cooked, add milk and heavy cream and bring to a simmer.
Add Toowoomba sauce (spicy cream) and grated Parmesan cheese, mixing well.
Add the cooked pasta and stir-fry with the sauce for 2 minutes.
Top with peperoncino and parsley to taste before serving.