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Mom’s Easy Homemade Katsu Sauce (10 Minutes)

DF Dairy-Free
Posted by Jess Larson on March 17th, 2025
THIS POST MAY CONTAIN AFFILIATE SALES LINKS. PLEASE SEE MY FULL DISCLAIMER POLICY FOR DETAILS.
Ditch the bottle – my Japanese-American Mom's Homemade Katsu Sauce is fresher, bolder, and way better than store-bought! This savory-sweet, umami-packed tonkatsu sauce comes together fast with just 5 pantry staples: shoyu, ketchup, brown sugar, Worcestershire, and a dash of cayenne. Drizzle over rice bowls, slather on a sando, or serve with crispy chicken katsu or pork tonkatsu. Quick, easy, and ready in just 10 minutes!
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An angled shot of a spoon drizzling katsu sauce into a small bowl of sauce on a grey textured surface. The bowl is surrounded by containers of ketchup, brown sugar, shoyu, Worcestershire sauce, and sea salt.
Photography by Gayle McLeod
Prep: 5 min
Cook: 5 min
Yield: 1/3 cup

The Must-Have Sidekick for Tonkatsu: Mom’s Homemade Katsu Sauce!

A good katsu sauce is non-negotiable for chicken katsu or pork tonkatsu – it’s the sweet, savory, umami-packed finishing touch that makes crispy cutlets truly irresistible. Think of it like a Japanese-style barbecue sauce: bold, tangy, and perfect for drizzling over any crunchy bite. 🤤

In my family, katsu night was always a highlight. I was a picky eater as a kid, but ultra-crispy chicken katsu was the one exception. How could it not be? Thin, juicy cutlets coated in panko, shallow-fried until golden brown…it’s basically a chicken tender!

And dunking it in Mom’s Katsu Sauce made it even better. 😋

An overhead shot of sauce drizzled over chicken katsu on a light teal plate with white rice and mac salad. this Recipe for Later!
My mom’s katsu sauce strikes just the right balance of sweet, tangy, and deeply savory. The perfect pairing for chicken katsu or pork tonkatsu!

True to Mom’s signature cooking style, this low-fuss, foolproof sauce comes together on the stovetop in just 10 minutes with 5 pantry staples.

Trust me – after one batch, you’ll never need the store-bought kind again! 🙌🏼

An overhead shot of ingredients in small bowls and measuring cups on a light grey textured surface: ketchup, brown sugar, shoyu, salt, pepper, cayenne pepper, and Worcestershire sauce.
This recipe gets its punchy flavor from 5 simple ingredients: ketchup and brown sugar for tangy sweetness, Worcestershire for umami, and shoyu for savory depth. Add a pinch of cayenne for a kick of heat.

Katsu Sauce Essentials

How To Make Katsu Sauce

Made from scratch in one pot with minimal prep, this katsu sauce is quick to pull together – you can even stir it up while your katsu fries!

An overhead shot of shoyu being poured into a saucepan with ketchup, Worcestershire sauce, brown sugar, salt, pepper, and cayenne pepper. The saucepan sits on a light grey textured surface.
Whisk together ketchup, brown sugar, shoyu, Worcestershire, salt, pepper, and cayenne in a small saucepan.
An overhead shot of a woman's hand holding up a spoonful of katsu sauce over a saucepan sitting atop a white textured surface.
Bring to a gentle simmer over medium heat, stirring often for 2-3 minutes until the sugar dissolves.
A close-up overhead shot of a spoonful of katsu sauce in a small white bowl of sauce on a grey textured surface.
Smooth, glossy, and just thick enough to cling to a crispy cutlet – your katsu sauce is ready to go!

Serving Suggestions

At my house, katsu night means one thing – a Hawaii-style plate lunch: crispy, golden cutlets drizzled with plenty of tangy-sweet sauce, a scoop of fluffy white rice, and Mom’s 25-Minute Local-Style Mac Salad. So ‘ono! 🌺🤙🏼

But tonkatsu sauce isn’t just for cutlets! Treat it like BBQ sauce – use it as a savory-sweet dip for fries or chicken nuggets, swipe it onto a burger or sando, or drizzle over your favorite rice bowls and stir-fries. You really can’t go wrong!

An angled shot of chopsticks dipping a piece of chicken katsu into a small white bowl of sauce on a light teal plate with katsu, white rice and mac salad.
An all-purpose sauce for chicken katsu, pork tonkatsu, sandos, rice bowls, and more. Trust me, you’ll want it on everything!

I can’t wait for you to try Mom’s Easy Katsu Sauce! If you do, be sure to let us know! Leave a comment with a star rating below. You can also snap a photo and tag @playswellwithbutter on Instagram. We LOVE seeing your PWWB creations! ♡ Happy cooking!

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An angled shot of a spoon drizzling katsu sauce into a small bowl of sauce on a grey textured surface. The bowl is surrounded by containers of ketchup, brown sugar, shoyu, Worcestershire sauce, and sea salt.

Mom’s Easy Homemade Katsu Sauce (10 Minutes)

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  • Author: Jess Larson
  • Prep Time: 5 minutes
  • Cook Time: 5 minutes
  • Total Time: 10 minutes
  • Yield: ⅓ cup 1x
  • Category: Sauces & Condiments
  • Method: Stovetop
  • Cuisine: Asian-Inspired, Japanese-American
Print Recipe

Description

Ditch the bottle – my Japanese-American Mom’s Homemade Katsu Sauce is fresher, bolder, and way better than store-bought!

This savory-sweet, umami-packed tonkatsu sauce comes together fast with just 5 pantry staples: shoyu, ketchup, brown sugar, Worcestershire, and a dash of cayenne. Drizzle over rice bowls, slather on a sando, or serve with crispy chicken katsu or pork tonkatsu.

Quick, easy, and ready in just 10 minutes!

Ingredients

Scale
  • ⅓ cup ketchup
  • ¼ cup lightly packed brown sugar
  • 3 tablespoons shoyu (can sub low-sodium soy sauce or tamari)
  • 1 tablespoon Worcestershire sauce 
  • optional: up to ¼ teaspoon cayenne pepper
  • kosher salt and ground black pepper, to season

Instructions

  1. Simmer the katsu sauce: In a small saucepan, combine all listed ingredients (ketchup, brown sugar, shoyu, Worcestershire sauce). Season with cayenne pepper and a dash of ground black pepper, if desired. Whisk to combine well. Place the saucepan on the stovetop over medium-high heat and bring the sauce to a gentle simmer, stirring often, until the sugar is dissolved, about 2-3 minutes. Taste and adjust seasoning with additional shoyu or kosher salt, as needed.An overhead shot of shoyu being poured into a saucepan with ketchup, Worcestershire sauce, brown sugar, salt, pepper, and cayenne pepper. The saucepan sits on a light grey textured surface. An overhead shot of a woman's hand holding up a spoonful of katsu sauce over a saucepan sitting atop a white textured surface.
  2. Serve: Enjoy your homemade katsu sauce immediately! It’s the perfect pairing for Crispy Chicken Katsu and Japanese pork tonkatsu but also makes a delicious dip for fries or chicken nuggets, a drizzle for burgers or sandwiches, or a savory addition to rice bowls and stir-fries. Enjoy!A close-up overhead shot of a spoonful of katsu sauce in a small white bowl of sauce on a grey textured surface. An overhead shot of sauce drizzled over chicken katsu on a light teal plate with white rice and mac salad.

Equipment

Notes

Jess’ Notes and Tips:

  • Shoyu is a Japanese-style soy sauce with a slightly mellower and more rounded flavor compared to the soy sauces commonly found in conventional U.S. grocery stores. Aloha Shoyu, brewed in Hawaii, is my favorite brand and a staple in my kitchen. If you can’t find shoyu, use any low-sodium soy sauce or your favorite alternative, such as tamari for a gluten-free option.
  • Dietary Restrictions: For a gluten-free katsu sauce, substitute shoyu/soy sauce with tamari or another gluten-free soy sauce alternative. Also, double-check that your ketchup and Worcestershire sauce are certified gluten-free. For a vegetarian or vegan katsu sauce, use vegan Worcestershire sauce – Annie’s is my favorite brand!

Storage Instructions: 

  • Storage Instructions: Transfer cooled katsu sauce to an airtight container or jar and store in the refrigerator for up to 2 weeks. This sauce stores beautifully, so feel free to make a double or triple batch to have on hand for quick meals and snacks.

Follow along with Plays Well With Butter on Instagram, YouTube, Facebook, and Pinterest for more unfussy recipes that pack a big punch of flavor!

A close-up overhead shot of sauce drizzled over chicken katsu on a light teal plate.
An angled shot of chopsticks dipping a piece of chicken katsu into a small white bowl of sauce on a light teal plate with katsu, white rice and mac salad.

Hi there, I'm Jess!

If there’s 1 thing to know about me, it’s this: I am head-over-heels in love with food. I’m on a mission to make weeknight cooking flavorful, fast, & fun for other foodies, & PWWB is where I share foolproof recipes that deliver major flavor with minimal effort. Other true loves: pretty shoes, puppies, Grey’s Anatomy, & my cozy kitchen in Minneapolis, MN.

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