Keto-Friendly Fast Food: Best Orders at 10 Major Chains

By Dr. Emily Johnson · Published November 7, 2025 · 10 min read

Eating keto friendly fast food sounds like a contradiction — but with the right ordering strategy, almost every major chain has options that fit comfortably within a 20–50g daily net carb budget. You just need to know exactly what to order, what to skip, and which hidden carb traps to avoid.

This chain-by-chain guide covers the 10 most popular fast food restaurants in the U.S., with specific menu items, net carb counts, and ordering tips for each one.

5 Universal Keto Ordering Rules

These rules apply at every chain before you look at the specific menu.

1. Skip the bun — a standard sesame bun adds 28–30g net carbs. Request your burger lettuce-wrapped or ask for it in a box.
2. Choose grilled over breaded — breaded fried chicken adds 15–25g of hidden carbs per piece. Grilled chicken has none.
3. Avoid fries, rice, and beans — large fries run 44–57g of carbs; rice and beans at Chipotle add 39g and 22g respectively.
4. Watch the sauces — ketchup (~4g per packet), BBQ sauce (~12g per serving), and honey mustard (~8g) add up fast. Stick to mayo, mustard, hot sauce, ranch, or sour cream.
5. Order water or unsweetened iced tea — regular sodas pack 39–52g of sugar per serving.

If you want to verify the exact carb counts for any meal, understanding net carbs vs. total carbs is essential — the distinction matters more at fast food chains than almost anywhere else.

Best Keto Fast Food Options — Chain Overview

Chain-by-Chain Guide

McDonald's

McDonald's is far more keto-workable than its reputation suggests. The key is to order any burger bunless and swap ketchup for mustard or mayo.

Best options:

• Double Cheeseburger (bunless, no ketchup) — 4g net carbs
• McDouble (bunless, no ketchup) — 3g net carbs
• Egg McMuffin (no muffin) — 3g net carbs
• Side salad (no croutons, vinaigrette on the side) — 3g net carbs

Avoid the hash browns (18g), any milkshake, and all dipping sauces except mustard packets.

Burger King

Burger King's Whopper is one of the most famous bunless burger orders in keto culture — just request it without the bun and without ketchup.

Best options:

• Whopper (bunless, no ketchup) — 3g net carbs
• Bacon Cheeseburger (bunless) — 2g net carbs
• Side salad — 2g net carbs

Avoid the chicken nuggets (25g net carbs per 9-piece serving) — they're breaded and entirely off-limits.

Wendy's

Wendy's stands out for offering several keto-friendly salads alongside the reliable bunless burger options. The Southwest Avocado Grilled Chicken Salad is one of the best full-meal keto options at any fast food chain.

Best options:

• Dave's Single (bunless, no ketchup) — 3g net carbs
• Grilled Chicken Sandwich (no bun) — 3g net carbs
• Southwest Avocado Grilled Chicken Salad — 6g net carbs
• Parmesan Caesar Grilled Chicken Salad — 3g net carbs

Chipotle

Chipotle is arguably the most keto-friendly fast food chain in America. It even lists a Keto Salad Bowl on its official website, making it the only major chain with a dedicated keto menu item.

Best options:

• Keto Salad Bowl (lettuce, grilled chicken, tomato salsa, sour cream, cheese, guacamole) — 6–8g net carbs
• Custom bowl: lettuce + steak or barbacoa + green salsa + sour cream + cheese — 5–7g net carbs
• Side guacamole — 3g net carbs

The items to avoid are the real carb bombs: a flour tortilla adds 49g, rice adds 39g, and black beans add 22g. Build your bowl on lettuce and you keep full control.

Chick-fil-A

Chick-fil-A's grilled offerings are exceptional for keto. The Grilled Nuggets are the standout — available in 8- or 12-count, they're made from whole chicken breast with essentially no carbs.

Best options:

• Grilled Nuggets (12-count) — 3g net carbs
• Grilled Chicken Sandwich (no bun) — 2g net carbs
• Cobb Salad with Grilled Chicken — 9g net carbs
• Side Salad — 3g net carbs

Keto-safe sauces: Zesty Buffalo (1g) and Garden Ranch (1g). Avoid the original breaded nuggets (12g per 8-count) and waffle fries (52g).

Subway

Every Subway sandwich can be ordered as a salad or protein bowl — same ingredients, no bread. This single customization turns Subway into a surprisingly versatile keto stop.

Best options:

• Tuna Protein Bowl (lettuce, spinach, cucumbers, green peppers, olives) — 3g net carbs
• Turkey Breast Salad — 5g net carbs
• Chicken & Bacon Ranch Salad — 6g net carbs

Use red wine vinegar or yellow mustard as dressing; avoid creamy sauces with hidden sugar.

Taco Bell

Taco Bell requires the most customization of any chain, but the Power Menu Bowl (minus rice and beans) is a genuinely good keto meal.

Best options:

• Power Menu Bowl (no rice, no beans, sub extra lettuce) — 5g net carbs
• Fiesta Taco Salad with Chicken (no shell, no beans) — 8g net carbs

Avoid anything in a tortilla (28–30g each), rice (+39g per addition), and refried beans (+20g).

KFC

KFC's Kentucky Grilled Chicken line is a hidden keto gem. Every grilled piece — breast, thigh, drumstick, or wing — contains 0g net carbs and provides high protein with plenty of fat from the skin.

Best options:

• Kentucky Grilled Chicken Breast — 0g net carbs
• Kentucky Grilled Chicken Thigh — 0g net carbs
• Green Beans (side) — 5g net carbs

Steer clear of Original Recipe and Extra Crispy chicken (8–15g carbs per piece from the breading), biscuits (24g), and mashed potatoes with gravy (26g).

Five Guys

Five Guys wraps all bunless burgers in foil — no special request needed, just say "no bun." Every topping (lettuce, tomato, onion, pickles, mushrooms, jalapeños, green peppers) is included at no extra cost and contributes minimal carbs.

Best options:

• Bunless Bacon Cheeseburger — 1g net carbs
• Bunless Little Hamburger — ~1g net carbs

The only carb risk here is the fries (57g for a regular serving) and the bun itself (40g). Avoid both and Five Guys is one of the cleanest keto stops available.

In-N-Out

In-N-Out's Protein Style option (a lettuce wrap instead of a bun) is not on the printed menu but is widely known. The Flying Dutchman — two beef patties and two slices of American cheese, nothing else — is the ultimate zero-carb fast food option.

Best options:

• Flying Dutchman — 0g net carbs
• Hamburger Protein Style — ~3g net carbs
• Double-Double Protein Style — ~8g net carbs (from the spread and onions)

Hidden Carb Traps to Watch For

Even experienced keto eaters get caught by these:

• Breaded vs. grilled chicken — the difference is 15–25g of carbs per piece. Always confirm you ordered grilled.
• "Protein bowls" with sneaky additions — some chains add corn, rice, or seasoned breadcrumbs to bowls labeled as healthy.
• Cheese sauce vs. real cheese — processed cheese sauces often contain modified starch; sliced real cheese does not.
• Salad dressings — honey mustard, raspberry vinaigrette, and any sweet dressing can add 8–15g per packet. Ask for dressing on the side and use only a small amount.
• Coleslaw — a comfort-food staple at many chains, but it typically contains added sugar (~10–14g net carbs per serving).

For a broader guide on eating out without losing track of your macros, our article on restaurant calorie counting covers practical strategies for any dining situation.

Keto Fast Food Breakfast Options

Keto breakfast at fast food chains is easier than most people think. The key is to skip the bread and stick to eggs, cheese, and meat.

• McDonald's: Egg McMuffin (no muffin) — 3g net carbs; Sausage, Egg & Cheese (no muffin) — 4g net carbs
• Wendy's: Breakfast Baconator (no bun) — 6g net carbs; Seasoned Potatoes are 39g — skip entirely
• Chick-fil-A: Egg White Grill (no muffin) — 1g net carbs; Hash Browns are 25g — avoid
• Burger King: Croissan'wich (no croissant, eggs and meat only) — ~3g net carbs

If you're following a structured plan, the 7-day keto meal plan includes breakfast templates you can mirror with fast food substitutions when you're on the go.

Tracking Your Keto Fast Food Intake

Knowing the right order is step one. Tracking it accurately — especially when you're customizing — is step two. Macros at fast food restaurants can shift significantly with modifications, and not all chains update their nutrition calculators for custom orders.

If you want to see exactly how your fast food choices fit into your daily keto targets, try Caloria — just snap a photo of your meal and get an instant carb, protein, and fat breakdown without manual data entry.

Frequently Asked Questions

What fast food can I eat on keto?

Almost every major chain works with the right modifications. Focus on bunless burgers, grilled chicken, salad bowls (without rice, beans, or croutons), and protein-based options. The five most keto-flexible chains are: In-N-Out, Five Guys, Chipotle, KFC, and Chick-fil-A.

Can you eat McDonald's on a keto diet?

Yes. A bunless McDouble with mustard instead of ketchup comes in at 3g net carbs and makes a perfectly adequate keto meal. Egg McMuffins without the muffin work well for breakfast. Avoid all fries, desserts, and sweet sauces.

What is the lowest carb fast food option overall?

The In-N-Out Flying Dutchman (two beef patties + two slices of cheese, nothing else) contains 0g net carbs. KFC Kentucky Grilled Chicken pieces are also 0g. A Five Guys bunless burger is 1g. These are the absolute floor.

How do I calculate net carbs from a fast food order?

Net carbs = total carbohydrates minus dietary fiber. Most chain nutrition calculators online show both totals. If you've customized your order significantly, a photo-based tracker is more accurate than a standard database entry. Our keto macro calculator can help you set your daily targets before you eat out.

Are there keto-friendly sauces at fast food restaurants?

Yes. Mustard, mayo, hot sauce, buffalo sauce, sour cream, and ranch dressing are all 0–2g net carbs per serving. BBQ sauce (~12g), ketchup (~4g per packet), honey mustard (~8g), and teriyaki sauce (~12g) are the main ones to avoid.

Start Tracking Smarter

Keto friendly fast food is easier to navigate than it looks — the strategies are consistent, the swaps are simple, and the best options at each chain are worth memorizing. The harder part is staying accurate when life gets busy and you're ordering from the drive-through in five minutes.

Download Caloria and see exactly what's on your plate — no manual entry needed:

• Download on the App Store

"Dietary carbohydrate restriction reliably reduces blood glucose and insulin levels and is well-tolerated in the short term." — Frontiers in Nutrition, PMC 2020