Preheat the oven and bake the taquitos

• Preheat the oven to 200 °C.
• Arrange the frozen taquitos in a baking dish in an even layer.
• Bake for 10 minutes.

Make the roux

• Melt the butter in a saucepan over medium heat.
• Add the flour and taco seasoning and stir; the mixture will be clumpy, which is fine.

Add the broth and cheese

• Pour in the chicken broth and stir constantly until smooth and thickened.
• Add the shredded cheese and stir until fully melted.

Finish the sauce with sour cream

• Stir in the sour cream and let it melt gently.
• Do not let the sauce boil.

Assemble and bake

• Pour the sauce evenly over the baked taquitos.
• Sprinkle the remaining shredded cheese on top.
• Bake for 10 more minutes until hot and bubbly.