Pesto Butter Pasta with Slow-Simmered Cherry Tomatoes

A warm bowl of angel hair tossed with pesto butter and topped with sweet slow-simmered cherry tomatoes — simple, glossy, and deeply comforting.

Nov 19, 2025

Pesto Butter Pasta with Slow-Simmered Cherry Tomatoes

A quick, satisfying pasta built from leftovers — warm pesto butter coating every strand of angel hair, finished with those sweet slow-simmered cherry tomatoes you keep in the fridge for upgrades like this.

Ingredients

8 oz angel hair pasta
2 tbsp Kerrygold salted butter
1/2 cup prepared pesto
Salt and pepper
2–3 ladles starchy pasta water (as needed)
Pecorino Romano or Parmesan, for serving

Instructions

  1. Cook the pasta
    1. Boil the angel hair in well-salted water. Just before draining, reserve at least 2 cups of the starchy pasta water.
  1. Season and butter the pasta
    1. Add the drained pasta to a bowl and season it with salt and pepper. Toss with the butter and a couple ladles of hot pasta water until the butter melts and coats the strands.
  1. Add the pesto
    1. Add the prepared pesto and keep mixing, loosening with more pasta water — usually 2 to 3 ladles total — until the sauce is glossy and clings to the pasta without being wet or soupy.
  1. Finish with cherry tomatoes
    1. Spoon the slow-simmered cherry tomatoes over the top, letting some of the tomato oil drip into the pasta. Finish with grated cheese.
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Notes

This was the perfect little snack — nothing fancy, just a clean bowl of glossy pesto butter pasta with a hit of sweetness from the tomatoes. The pasta water really makes the sauce, so don’t skip it.