For blackening rub, combine first seven ingredients and stir to thoroughly mix.
Coat shrimp with spice/herb blackening rub. You'll have more rub than you need for this recipe. Save the extra for grilled chicken, pork or seafood.
Combine butter and olive oil in a sauté pan. Heat over medium-high heat until hot and bubbly but not brown. Add shrimp and cook quickly, about 1-1 ½ minutes per side, until blackened in patches. Remove from pan and serve warm over Lemon Risotto.