Pesto Butter Grilled Cheese Sandwiches

Ingredients

• 4 tablespoonsunsalted butter, at room temperature
• 1 tablespoon, plus more for spreadingshop-bought basil pesto
• 4–6 slicesGouda, Muenster or Monterey Jack cheese
• 4 slicesthick-sliced bread, preferably sourdough

Instructions

1. 1

   Mix pesto butter

   Stir 1 tablespoon of pesto into the softened butter in a small bowl. Spread the mixture over one side of each of the four bread slices.

2. 2

   Fill and fry

   Turn the bread over so the buttered sides face down, then spread the other sides with more plain pesto. Cover two slices with cheese and place the remaining bread on top, buttered sides facing out. Fry in a skillet over medium heat, turning once the underside is golden brown. Cook the second side until browned and the cheese has melted.

3. 3

   Rest and serve

   Transfer the sandwiches to a chopping board and leave them to cool for 3 minutes. Slice each in half and serve warm.

What are pesto butter grilled cheese sandwiches?

Grilled cheese is a simple sandwich of bread and melting cheese, toasted in a pan until the outside is crisp. This version adds basil pesto both to the butter on the outside and as a spread inside.

Pesto is associated with Genoa in northern Italy, while grilled cheese is a familiar comfort-food format in many places. Here, pesto brings a fragrant, savoury note to the rich cheese and toasted sourdough.

Nutrition and macros by portion

The nutrition label shows one serving as written: 760 calories, 28g protein, 48g carbs, 51g fat.

Most of the carbohydrates come from the bread, while butter and cheese contribute much of the fat; the cheese also supplies most of the protein. Serve a half alongside salad or tomatoes for a lighter-feeling plate, or pair it with soup for a more substantial meal.

Choosing the bread and cheese

Bread: Thick slices give the sandwiches enough structure to hold the filling and develop a crisp crust. Sourdough is the suggested choice, but another sturdy loaf will work.

Cheese: Gouda, Muenster and Monterey Jack are the options in the recipe. Use 4–6 slices in total, depending on their size and how cheesy you like the filling.

Getting the pesto butter right

Softened butter: Let it come to room temperature so it mixes easily with the pesto and spreads without tearing the bread.

Two layers: The pesto butter goes on the outside, while plain pesto goes on the inside. Keep the outer coating even so the bread browns consistently.

Frying for a crisp crust

Medium heat gives the bread time to turn golden while the cheese melts. If the pan is too hot, the crust can brown before the filling is warm.

Flip cue: Turn the sandwich when the underside is golden brown, then cook the other side until browned too. The centre should be melty when you press the sandwich gently.

Timing and resting

The stated total time is 12 minutes, so have the butter, pesto and cheese ready before you start frying. The cooking time can vary with the bread thickness and the heat of your pan.

Rest the sandwiches on a cutting board for 3 minutes before slicing. This brief pause helps the hot cheese settle and makes the halves easier to handle.

What to serve alongside

A crisp green salad or sliced tomatoes add freshness alongside the rich, toasted sandwich. For a warmer meal, serve it with tomato soup.

Cut each sandwich in half and serve while the cheese is still warm and soft.

Recipe notes & tips

• Soften the butter before mixing so it spreads smoothly.
• Use medium heat to brown the bread without rushing the cheese.
• Spread the pesto butter in an even layer over each slice.
• Keep an eye on the underside and flip once it is golden brown.
• Rest the sandwiches for the full 3 minutes before slicing.

Variations

• Choose another cheese: Use a similarly good-melting cheese in place of the listed options.
• Try another bread: Swap sourdough for a different thick-sliced loaf.
• Add tomato: Layer thin tomato slices with the cheese for a fresh, juicy filling.
• Add spinach: Tuck a small handful of spinach inside before frying.
• Use extra pesto: Spread a little more inside for a stronger basil flavour.

Common mistakes to avoid

• Butter too firm: Soften it first so spreading does not tear the bread.
• Uneven coating: Cover the buttered side evenly to help the bread brown consistently.
• Heat too high: Keep the pan at medium so the crust does not brown before the cheese melts.
• Flipping too soon: Wait for a golden underside before turning the sandwich.
• Cutting immediately: Rest the sandwiches for 3 minutes before slicing to make them easier to handle.

How to store

These sandwiches are best eaten warm straight after cooking. If needed, refrigerate leftovers in a sealed container for up to 2 days, then reheat in a skillet over medium-low heat until warmed through and crisp again.

Frequently asked questions