Keto Zucchini Slices Topped With Parmesan & Bacon Crumbles

Zucchini rounds topped with melted cheese and crumbled bacon on a white plate Save to Pinterest
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Introduction

Ranch seasoning, garlic powder, parmesan and crumbled bacon, on a zucchini round. It is a loaded potato skin built on a vegetable, and it eats like one.

The method has two bakes rather than one. The slices go in bare for five minutes first, and only then get their toppings and go back for ten. The preparation matters just as much: cut them to an even quarter inch, and pat them dry before they go anywhere near the oven. That is what decides whether they come out crisp instead of soggy.

Keto Loaded Parmesan Zucchini Slices

Prep Time
15 minutes
Cook Time
15 minutes
Total Time
30 minutes
Yield
6 servings
Course
Appetizer, Side Dish
Cuisine
American
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Ingredients

All Ingredients

Nutrition Facts

6 servings per recipe
Trans Fat 0g 0% 0g 0%
Sugar Alcohols 0g 0% 0g 0%
Allulose 0g 0% 0g 0%

About these numbers: We are home cooks, not certified nutritionists. Nutrition is shared as a courtesy. We pick a representative product for each ingredient, and our recipe system works out the totals from the amounts in this recipe, so please treat them as a helpful estimate rather than a guarantee. The brands you buy, any swaps you make, and how generously you portion the recipe will all move these numbers.

Directions

  1. Gather Your Ingredients

    What each one is doing is in the Ingredient Notes below.

  2. Preheat oven to 350 degrees Fahrenheit.

    This is to ensure optimal cooking conditions for our keto zucchini slices.

  3. Line a baking sheet with parchment paper or grease it with oil or cooking spray.

    Lining the baking sheet with parchment paper will prevent the zucchini slices from sticking, making them easier to remove later.

  5. Spread your sliced zucchini over the prepared baking sheet.

    Arrange them in a way that no slices overlap each other. Leave some space between each slice to allow for proper air circulation. This is to ensure that each slice is baked evenly while in the oven.

  6. Bake the zucchini slices in the preheated oven for 5 minutes.

    Remove the zucchini slices from the oven once done baking.

  7. Sprinkle ranch seasoning over each pre-baked zucchini slice.

    Make sure that each zucchini slice is sprinkled with a sufficient amount of ranch seasoning.

  8. Sprinkle garlic powder over the zucchini slices.

    Same with the ranch dressing, make sure that each slice is sprinkled with a sufficient amount of garlic powder.

  10. Sprinkle the grated parmesan cheese over the zucchini slices.

    Sprinkle a generous amount of parmesan cheese over each slice. You want each slice loaded with the savory punch of grated parmesan cheese.

  11. Top each zucchini slice with cooked, crumbled bacon

    The unique and delicious taste of bacon will complement the flavors of the other ingredients, making the zucchini slices a more enjoyable dish to eat.

  12. Place the loaded zucchini slices once again in the oven.

    Bake for 10 minutes, until the zucchini is tender and the parmesan is golden.

    If you want the top browner than the oven gets it, the broiler will do it in a minute or two - but move the slices onto a bare metal sheet first. Parchment paper is not rated for broiler heat, and most brands say so on the box. Watch them the whole time; this is not a step to walk away from.

Notes

Ingredient Notes

  • Zucchini, in ¼-inch slices. Pat them dry with a paper towel before they go in — dry slices come out crisp rather than soggy — and even slices bake evenly.
  • Grated parmesan. Freshly grated is ideal; pre-shredded from a bag works.
  • Garlic powder. Fresh garlic works if you would rather.
  • Ranch seasoning. This is where most of the flavor comes from, and it is a packaged blend — check the label, both for carbohydrate and, if it matters to you, for milk solids.
  • Bacon pieces, cooked and crumbled. Real bacon or a packaged bacon topping both work here. Check the label on a packaged one.

Tools

  • A sharp knife, or a mandolin. The zucchini goes into ¼-inch slices, and they bake more evenly when the slices match each other. A mandolin slicer gets them consistent faster than a knife does.

Preparation

  • If you plan to use whole parmesan cheese, grate it before making the recipe.
  • Feel free to adjust the amount of seasonings (garlic powder and ranch seasoning) you add according to your preference. Increase the quantity if you want the flavors to be stronger, or decrease it if you want them to be milder.
  • Done is the parmesan golden and the zucchini tender. The crisp is in the topping - the slices underneath stay soft, and they are meant to.
  • There’s plenty of room for customization! If you want to spice things up, add crushed red pepper flakes or your favorite Cajun Seasoning in addition to, or in place of, the ranch seasoning. Or, perhaps, you prefer Trader Joe’s insanely popular Everything But the Bagel seasoning. You can add even more kinds of cheese, such as cheddar cheese and feta cheese. Just be mindful of the carb count so that your loaded zucchini slices remain keto-friendly.
  • For a plainer version, toss the slices with olive oil, salt and pepper and skip the seasonings, parmesan and bacon. We have not worked that version out as its own recipe, so the two bakes above are a starting point rather than a timing for it — without the cheese there is nothing to brown, so go by the zucchini.

Storage

  • Once these yummy slices of goodness have been baked, they can be stored in an airtight container in the fridge for up to two days (woo hoo for three days worth of snacks!)! Then, when you’re ready to heat them back up, pop them in the oven and bake at 350 degrees for about 5 minutes or until warmed.

Serving Suggestions

  • Let your cooked keto zucchini slices cool down first before consuming. They’re scorching hot when just out of the oven, which can burn your mouth if consumed immediately.
  • Pair your delicious keto zucchini slices with a keto-friendly dip! This low-carb jalapeño cilantro dip packs some heat and spice. Or sour cream will do if you prefer it to be simple. Can’t get enough of cheese? Then go for a cheese dip! Feel free to experiment with what dip or sauce you can pair with your delicious keto zucchini slice. Just remember to keep it keto!
  • Garnish your keto zucchini slices with chopped fresh herbs like parsley, basil, or chives. They will add color and extra freshness to the dish.
  • Squeezing some fresh lemon juice over the zucchini slices will add a bit of sourness that complements the savory flavors.
  • While the keto zucchini slices can be eaten as a snack, they also work well as an appetizer or side dish.

Frequently Asked Questions

Can I use frozen zucchini slices for this recipe?

Yes, you can. While fresh zucchini is strongly recommended, you can use frozen zucchini slices if they’re your only option. Make sure to pat them dry with paper towels after washing them to remove any extra moisture.

Can I make this recipe dairy-free?

The parmesan is the obvious one, and nutritional yeast or a vegan parmesan will stand in for it — or you can leave it out and accept a less cheesy slice.

Check the ranch seasoning as well. Many ranch blends are made with buttermilk or milk solids, so a packet that looks like dried herbs may not be dairy-free. The label is the only way to know which one you have.

For a vegan version, the bacon has to go too, or be swapped for a plant-based topping.

Can I use zucchini substitutes?

Yellow squash is the closest thing to it — similar water content, similar size, and it slices the same way. Eggplant will take the toppings too, though it is a denser vegetable and the two bakes here are written for zucchini, so treat the timings as a starting point. We have not tested either as its own version.

Can I bread the keto zucchini slices with almond flour?

That would be a different recipe rather than a variation on this one. This recipe sprinkles the seasonings and cheese over bare slices; breading them means adding beaten egg to make the coating stick, mixing the seasonings into the flour instead, and a single bake rather than two.

We have not worked that version out, so we cannot give you a timing for it.

Are zucchinis even allowed on the keto diet?

Yes. Zucchini is mostly water, and it is low enough in carbohydrate that it fits comfortably. For the actual figures against a defined serving, our guide to whether zucchini is keto has them, along with the other zucchini recipes here.

Wrap-Up

A golden parmesan top, bacon on every slice, and the zucchini underneath tender rather than crunchy — the crisp is in the topping, which is worth knowing before you bite one.

Give them a minute out of the oven first. They come out hot enough to catch you.

Wondering how a serving fits into your day? Our guide on whether zucchini is keto-friendly gives the carbohydrate and fiber figures for a clearly defined serving, and the Nutrition Facts panel above covers this recipe as it is made.

Updated — September 23, 2026: The broiler finish now says to move the slices onto a bare metal sheet rather than leaving them on the parchment, and each ingredient has its own notes section instead of being crammed into the first step.

Correction — September 23, 2026: The dairy-free answer said parmesan was the only dairy in the recipe. Many ranch seasoning blends are made with buttermilk or milk solids, so the label is worth checking too.