Jalapeño Cheddar Cheese Sauce

This isn't just melted cheese; it's a classic Mornay sauce made famous by Tex-Mex cuisine. The secret lies in the roux (butter and flour base), which stabilizes the milk so the cheese doesn't separate but forms a creamy, velvety emulsion. The acidity and heat of the jalapeño cut through the richness of the cheese, keeping every bite fresh.
🕒 Prep Time 10 mins
🍳 Cook Time 15 mins
Total Time 25 mins
🍽️ Servings 4 servings
🔥 Calories 310 kcal
🌍 Cuisine Mexican/Tex-Mex

Ingredients

Equipment Needed

  • Heavy-bottomed saucepan (for even heat)
  • Whisk (for lump-free sauce)
  • Cheese grater
  • Cutting board and knife

Allergen Information

⚠️ Milk
⚠️ Wheat

Instructions

1

Prep ingredients: shred the cheese and garlic, and finely dice the jalapeños.

Tip: Shred cheese while cold, but let it come to room temperature before melting for smoother results.
2

Melt butter in a saucepan over medium heat. Whisk in flour and cook for 1-2 minutes until pale golden.

Tip: This is a roux. You must cook the flour taste out, or the sauce will taste pasty.
3

Gradually whisk in the milk in small splashes, whisking vigorously.

Tip: Adding milk slowly is the key to a smooth texture.
4

Simmer on low until thickened (3-4 minutes), then remove from heat.

Tip: Reduce heat or remove entirely before adding cheese to prevent separation.
5

Stir in the shredded cheese a handful at a time until melted and smooth. Stir in the garlic and jalapeños.

Tip: Sharp cheddar gives a stronger flavor.
6

Season with salt and pepper. Taste and adjust.

Tip: Be careful with salt, as cheese is naturally salty.
7

Serve immediately with tortilla chips.

Tip: A skin will form as it cools; cover surface with plastic wrap if storing.

Recipe FAQ

Why is the sauce grainy?
You likely cooked the cheese at too high a temperature, or used low-fat cheese. The proteins clumped together.
Can I use pre-shredded cheese?
Not recommended. Pre-shredded cheese is coated in starch to prevent sticking, which prevents the sauce from becoming perfectly smooth.
It's too thick, what should I do?
Stir in a little more warm milk until you reach the desired consistency.

Ingredients

  • 8 oz Cheddar Cheese (block, freshly shredded)
  • 2 whole Fresh Jalapeños (diced)
  • 2 tbsp Butter
  • 3/4 cup Whole Milk
  • 2 tbsp All-Purpose Flour
  • 1 clove Garlic (grated)
  • 1/2 tsp Salt
  • 1/4 tsp Black Pepper