Grandpa Spencer's Mustard

Originally Grandma Spencer's recipe - our three flavors of mustard are a family owned recipe that are packed with delicious flavors every member of the family will enjoy.

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Grandpa Spencer's Mustard

A Locally Owned Business

In 1935 my Grandmother Adora Spencer created the original sweet and spicy mustard. My grandfather loved it so much that we decided to name it after him - but Adora should really be getting all the credit.

In 2010 we launched the Original family recipe because it's just too good to keep to ourselves. In October of 2014 we expanded our line with the horseradish and the hot and spicy to ensure that there was a flavor for almost anyone!

a jar of hot and spicy mustard
a jar of sweet and spicy mustard

Why Choose Our Mustard?

Get to know why you should go with us

Gluten Free

None of our products contain gluten so we are safe for the whole family.

Specials Available

Save when you stock up! Two and three jar specials available.

Locally Owned

Check out our #events section and come see us in person!

Health Friendly

Mustard is rich in protein, fiber, vitamin C, and powerful antioxidants! Another great reason to put it on everything.

Super Tasty

We offer free tastings at every live event! Enjoy on pretzels, burgers, or really anything!

15% OFF

We are offering a 15% off special on all web site orders of two or more jars. Please use the code "GSMustard2023" when you place your order.

Become a Reseller

Want to carry our mustard in your stores?

Become a partner and help us grow! View our partners page to see where to buy our mustard in store or send us an email and let's work together!

Partner Information

Send us an email and let us know where you would like to sell our mustard!

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The Three Flavors

Try each of our three delicious flavors! Each is flavorful and unique - there's truly something for everyone.

Hot and Spicy

9oz jar of Grandpa Spencer's hot and spicy flavored mustard
Hot and sweet mustard, with a nice kick. The heat level is about the same as a cayenne pepper. Excellent on sliced meat sandwiches or anything you can cook on the smoker or grill. It can also be used in recipes for home made chili, BBQ sauces or anything else. Let your imagination go crazy.

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9oz jar of Grandpa Spencer's horseradish flavored mustard
This is a gourmet horseradish mustard with a sweet base. The heat level is mild to medium and won't wipe out your sinuses. Excellent on sliced meat sandwiches or anything you can cook on the smoker or grill. This is our top selling product by far. You will be pleasantly surprised when you taste it.

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Our Progress

Check our progress over the years


Pretzels Consumed


Jars Sold in 2021


Events in 2021


Happy Customers

Meet the Team

Meet the family!
a photo of Charlie Adams

Charlie Adams

The mustard king of Saint Louis! Owner and Salesman, you'll meet me if you go to any live event.

a photo of Nick Adams, Charlie's son

Nick Adams

Somewhere between tech-guy and CTO. I work behind the scenes to make online ordering seamless.

a photo of Ciara Hatcher

Ciara Hatcher

The girl behind the camera. I sometimes will come to shows to snap some pictures. Say Mustard!

Local News

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Questions or concerns?
If you have a question or something just doesn't meet your standards, please reach out and we will do what we can to make it right.