Best Yellow Squash Pasta with Garlicky Parmesan Sauce

What Are Kentucky Butter Cake Cookies?

This yellow squash pasta is one of those recipes I started making on a random Tuesday, mostly because I had more summer squash than I knew what to do with.

I expected a simple vegetable toss, but what I got was a bowl of pasta coated in the most velvety garlicky Parmesan sauce.

Tender squash rounds cook down, pick up deep golden color, and then get blended into a sauce that clings to every strand of spaghetti.

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The finished dish feels a little fancy, but the ingredient list is reassuringly short. There is no heavy cream and no complicated roux. Yellow squash brings the body, good Parmesan brings the savory richness, and lemon juice lifts everything at the last minute.

It is the kind of weeknight dinner that makes the kitchen smell amazing without asking you to stand over the stove for an hour.

If you have never turned summer squash into a sauce, this recipe is a gentle place to start. You get the comfort of pasta with a sauce that tastes far more complex than the sum of its parts.

Quick Recipe Overview

This recipe is built for busy weeknights. The prep is simple slicing and dicing, and the sauce comes together in one large pan while the pasta boils. You do not need any special equipment beyond a blender.

Estimated nutrition for the whole recipe:

The browning step is the secret. Let the squash get deep color around the edges before you blend it.

What Goes Into Kentucky Butter Cake Cookies

The ingredient list is short, which means each item gets a chance to shine. I always use Barilla pasta because I can count on that perfect al dente bite, and I grate Sargento Parmesan off the block because it melts more smoothly than pre shredded cheese.

For the pasta

• 1 lb pasta, such as Barilla spaghetti or linguine

For the squash sauce

• 4 tsp olive oil
• 7 cups yellow squash, sliced into 1/4 inch rounds
• 1/2 large onion, diced
• 4 cloves garlic, freshly minced
• 1 1/4 cups Parmesan cheese, grated off the block
• 1 1/4 tsp salt
• 3/4 tsp black pepper
• 1/4 tsp crushed red pepper flakes
• 1 tbsp lemon juice

For the garnish

• 1/4 cup fresh parsley, chopped

The lemon juice and parsley are small measures, but they matter. Lemon brightens the sauce and keeps the Parmesan from tasting heavy, while parsley adds a fresh green note right before serving.

Tools to Make the Cookies Just Right

You do not need a fully stocked kitchen for this recipe, but a few tools make the process smoother.

• Large pot for boiling pasta
• Large skillet or Dutch oven for the squash
• Blender for creating the velvety sauce
• Colander for draining
• Measuring cups and spoons
• Cheese grater for Parmesan off the block
• Wooden spoon or spatula for stirring

I keep a liquid measuring cup next to the colander so I never forget to reserve the pasta water. That starchy water is your best tool for loosening the sauce at the end.

How to Bake Kentucky Butter Cake Cookies

1. Bring a large pot of salted water to a boil and add the pasta, cooking until just al dente according to package directions. Before draining, reserve 1 cup of the starchy pasta water. While the pasta cooks, slice the squash into 1/4 inch rounds, dice the onion, and mince the garlic cloves. Freshly minced garlic makes a noticeable difference, so it is worth the extra minute.
2. Heat the olive oil in a large pan over medium high heat and add the diced onion, cooking for about 1 minute until just starting to soften. Add the sliced squash, minced garlic, salt, black pepper, and crushed red pepper flakes, then cook for 15 to 20 minutes, stirring occasionally, until the squash is completely tender and deeply browned on the edges. The browning develops deeper flavor, and the squash will break down significantly, which is exactly what you want for a smooth sauce.
3. Transfer the cooked squash mixture to a blender and blend until completely smooth, creating a velvety sauce base. I like to leave it slightly warm when blending because it blends more easily and helps the cheese melt evenly in the next step. Work in batches if your blender is small.
4. Pour the blended squash back into the large pan over low heat and stir in the Parmesan cheese, mixing constantly until the cheese melts completely and the sauce becomes creamy and cohesive. Add the cooked pasta and fold it gently into the sauce. If the mixture seems too thick, add reserved pasta water 1/4 cup at a time, stirring well between each addition, until you reach a silky coating consistency.
5. Remove the pan from heat and stir in the lemon juice. Taste and adjust with additional salt and pepper as needed. Fold in the fresh parsley just before serving to keep its color and flavor bright.

Flavor Additions and Variations

The base sauce is already balanced, so I treat this as a recipe to enjoy as written first. The garlic, Parmesan, and lemon work together without needing much help. If I want a little extra heat on a cold night, I will add a tiny pinch more crushed red pepper to my own bowl rather than changing the whole pan.

Sometimes I serve the pasta plain with a big grind of black pepper, and other nights I add a handful of leftover shredded chicken or some sautéed shrimp to make it more substantial. The sauce is forgiving enough to hold its own either way.

What I do not do is swap pre shredded Parmesan for the block cheese, because the sauce will not melt into the same silky texture.

If you want a more pronounced lemon flavor, hold back a little lemon juice at first and taste as you go. The recipe is meant to be bright, not sour, so the final balance is up to you.

How to Serve Kentucky Butter Cake Cookies

This pasta is best served right away while the sauce is still silky and warm. I like to portion it into wide bowls and finish each serving with a little extra Parmesan and a crack of black pepper. A lemon wedge on the side is a nice touch if you want people to brighten their own bowl.

It also works well with a simple green salad dressed in lemon and olive oil, or with a piece of garlic bread for soaking up any sauce left at the bottom of the bowl.

Because the sauce is not based on heavy cream, it pairs nicely with grilled chicken, roasted shrimp, or a pile of sautéed greens if you want a larger meal.

Storing the Cookies Without Losing Texture

If you have leftovers, let everything cool slightly, then store the pasta and sauce together in a sealed container in the refrigerator.

The sauce will thicken as it sits, so when you reheat it, warm it gently in a pan with a splash of water or a little reserved pasta water. Stir as it heats, and the sauce will loosen back up without turning greasy.

I usually make this for dinner and enjoy any leftovers for lunch the next day. The pasta stays tender when reheated slowly, and the garlicky Parmesan flavor often tastes even better after a night in the fridge.

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What Are Kentucky Butter Cake Cookies? This yellow squash pasta is one of those recipes I started making on a random Tuesday, mostly because I had more summer squash than I knew what to do with.

• Total Time: 35 minutes
• Yield: 6 1x

Ingredients

Scale 1x2x3x

For the pasta
1 lb pasta

For the squash sauce
4 tsp olive oil
7 cups squash, sliced into 1/4-inch rounds
1/2 large onion, diced
4 cloves garlic, freshly minced
1 1/4 cups parmesan
1 1/4 tsp salt
3/4 tsp black pepper
1/4 tsp crushed red pepper flakes
1 tbsp lemon juice

For the garnish
1/4 cup fresh parsley, chopped

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Instructions

Method
1-While you’re gathering everything, bring a large: While you’re gathering everything, bring a large pot of salted water to a boil and add the pasta, cooking it until just al dente according to package directions. Before draining, reserve 1 cup of the starchy pasta water-this is crucial for adjusting the sauce consistency later. While the pasta cooks, slice the squash into 1/4-inch rounds, dice the onion, and mince the garlic cloves. Freshly minced garlic makes a noticeable difference in flavor compared to pre-minced, so it’s worth the extra minute.
2-Heat the olive oil in a large: Heat the olive oil in a large pan over medium-high heat and add the diced onion, cooking for about 1 minute until just starting to soften. Add the sliced squash, minced garlic, salt, black pepper, and crushed red pepper flakes, then cook for 15-20 minutes, stirring occasionally, until the squash is completely tender and deeply browned on the edges. The browning develops deeper flavor, and the squash will break down significantly, which is exactly what you want for a smooth sauce.
3-Transfer the cooked squash mixture to a: Transfer the cooked squash mixture to a blender (working in batches if needed) and blend until completely smooth, creating a velvety sauce base. I like to leave it slightly warm when blending rather than letting it cool completely, as it blends more easily and the warmth helps the cheese melt evenly in the next step.
4-Pour the blended squash back into the: Pour the blended squash back into the large pan over low heat and stir in the grated Parmesan cheese, mixing constantly until the cheese melts completely and the sauce becomes creamy and cohesive. I prefer grating Parmesan from a block rather than using pre-shredded, as it melts more smoothly without any cellulose additives. Add the cooked pasta from Step 1 and fold it gently into the sauce. If the mixture seems too thick, add reserved pasta water 1/4 cup at a time, stirring well between each addition, until you reach a silky, coating consistency.
5-Remove the pan from heat and stir: Remove the pan from heat and stir in the lemon juice, which brightens the squash flavor and cuts through the richness of the cheese. Taste and adjust seasoning with additional salt and pepper as needed. Fold in the fresh chopped parsley just before serving to maintain its vibrant color and fresh flavor.

Last Step:

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• Prep Time: 10 min
• Cook Time: 25 min
• Method: stovetop

Nutrition

• Calories: 2200
• Fat: 60-70
• Carbohydrates: 330-350
• Protein: 65-75