Toasted vs. Charred Barrels: Know the Difference

When thinking about what makes the ultimate spirit, one major part is the barrel. Oak barrels are responsible for the final spirit's flavor, aroma, mouthfeel, and finish. A major choice for producers is to decide between using toasted vs. charred barrels. Both processes include heating the oak but will create different results when the spirit is finally poured into a glass.

At Rocky Mountain Barrel Company, we offer a wide range of new and used oak barrels and give customers the chance to choose the products they want for aging their favorite whiskey, bourbon, rum, and wine. Knowing barrel toast vs. barrel char will help you choose the right barrel for your desired flavor profile.

What Are Toasted Barrels?

Toasting barrels is a very slow process and requires a low temperature versus what is used in charred barrels. Because of the lower temperature, there is no burned charcoal layer on the interior. Barrels that undergo this process show a golden-brown or dark-brown color, versus the blackened walls seen in charred barrels.

This gradual process is very helpful for the spirits. It allows for the extraction of many more flavor profiles, including some more delicate ones. Some of the attributes that can be tasted in spirits aged in toasted barrels include:

• Vanilla 

• Baking spices 

• Clove 

• Nutmeg 

• Toasted Wood 

• Light Caramel 

• Cocoa notes

What Is a Charred Barrel?

Burning wood for a charred barrel has a much more intense heating process than traditional barrel making. During this process, the fire burns directly onto the wood and builds a deeply charred inner layer of charcoal. This can be a light char, a deep char, or an "alligator char."

A layer of charcoal has several functions in the maturing spirit's process. It helps filter the spirit, pull unwanted elements, and builds flavor. It also helps add wood sugars that have been caramelized. In the United States, it is a requirement that bourbon is matured in a newly made, charred oak barrel.

A charred barrel can build many flavor profiles. Some are:

• Caramel 

• Brown sugar 

• Vanilla 

• Honey 

• Toasted marshmallow 

• Rich oak 

• Deeper color development

Many of these flavors build and strengthen the more charred the barrel is.

Toasted Barrel vs. Barrel Char: The Key Differences

The primary distinction is flavor. Charred barrels will have bolder flavors that will be sweeter. On the other hand, toasted barrels will contain more complex layered flavors. When subtle flavors are required, toasted barrels will be preferred, but for stronger oak flavors, charred barrels will be necessary.

Typically, color and flavor will coincide. Heavily charred barrels tend to add more color, while toasted barrels will add a slower and lighter color.

Filtration Effects

Barrel Char has an added benefit that's often overlooked. The charcoal layer acts like activated carbon. It filters sulfur and other bad notes from the spirit while it ages. Toasted barrels don't have the same effect.

Aging Impact

Barrel toasting allows for more controlled wood interaction and is typically used for finishing already aged spirits. Charred barrels have more influence on extraction and are designed for primary aging.

Which Spirits Benefit Most from Each Barrel Type?

Toasted barrels are typically used to age:

• Craft whiskey finishes 

• Brandy 

• Rum 

• Specialty spirits 

• Experimental aging programs

Toasted barrels are becoming more popular for innovative producers to age spirits because they allow for added notes of vanilla and spice and allow the base spirit to remain in focus.

Charred barrels are typically used to age:

• Bourbon 

• American whiskey 

• Rye whiskey 

• Full-bodied spirits

Charred American barrels help form the expected color and develop the flavor of American oak barrels that whiskey drinkers love.

Can a Barrel Be Both Toasted and Charred?

Yes. Many premium barrels are both toasted and charred. The barrel could be toasted first to develop the flavors and then charred to create the charcoal layer. This process creates a win-win for the distiller and is becoming more common for premium finishing programs.

Choosing the Right Barrel for Your Aging Program

There is no universally correct answer in the toasted versus charred debate. It depends on spirit style, production goals, and the flavors that are being targeted.

Charred barrels offer bolder caramel notes and a darker, more traditional whiskey profile. Toasted barrels add layers of spice and refined oak notes. Many producers have begun to utilize both barrel types to achieve a new expression.

At Rocky Mountain Barrel Company, we have high-quality new and used barrels from top cask makers around the world. If you want to use toasted barrels or charred barrels, or if you want a custom solution, we have a variety of options. The right barrel solution can help you achieve your business goals and create transformation in your spirits.