Source: Foodwishes.com

Ingredients

• 2 tablespoons butter
• 2 tablespoons olive oil
• 1/2 cup diced onion
• 1/2 teaspoon salt, or more to taste
• 3 tablespoons all-purpose flour, or more as needed
• 2 tablespoons ground ancho chile powder
• 2 teaspoons ground cumin
• 1/2 teaspoon chipotle chile powder
• 1/2 teaspoon freshly ground black pepper
• 1/4 teaspoon dried oregano
• 1 pinch cayenne pepper, or to taste
• 1 pinch ground cinnamon (optional)
• 3 cloves garlic, minced
• 2 tablespoons tomato paste
• 2 1/2 cups chicken broth

Method

Melt butter with olive oil in a saucepan over medium heat. Add onion and salt; cook and stir until onion starts to turn golden brown, 3 to 5 minutes. Stir in flour, chile powder, cumin, chipotle powder, black pepper, oregano, cayenne, and cinnamon. Cook and stir until fragrant, about 3 minutes. Add tomato paste and mix until fully combined. Pour in chicken broth and whisk until smooth. Increase heat to high and bring sauce to a simmer. Reduce heat to medium-low and simmer, stirring occasionally, until flavors come together, about 10 minutes. Taste and season as desired. Blend sauce with an immersion blender.