Ruth Chris Mashed Potatoes Recipe: Steakhouse-Style Creamy Decadence

This professional method delivers the creamy texture that made Ruth’s Chris famous. The secret lies in the perfect ratio of butter to potatoes and a specific mashing technique.

I’ve tested countless variations to recreate that signature steakhouse quality at home. The key is using starchy potatoes and warming the dairy before mixing to prevent a gluey consistency.

What results is an ultra-smooth, buttery purée with just the right amount of richness. The potatoes absorb the cream and butter completely, creating that luxurious mouthfeel.

Serve this alongside your favorite steak for a restaurant-worthy meal. The recipe scales easily for any size gathering.

Ingredients for Ruth Chris Mashed Potatoes

Starchy potatoes, warm dairy, and a perfect butter ratio create this luxurious purée.

The potatoes must be high-starch Russets—they absorb the dairy beautifully and yield that ultra-smooth texture. Yukon Golds work in a pinch but result in a slightly denser purée. For the dairy, room temperature butter is critical to prevent a greasy finish. I source my Parmigiano-Reggiano from Whole Foods for consistent quality. The cream and milk should be full-fat (trust me on the full-fat version) to achieve authentic steakhouse richness.

No heavy cream? Whole milk plus melted butter at a 3:1 ratio mimics the fat content. Skipping the sour cream? Full-fat Greek yogurt is an acceptable substitute. For garlic, jarred minced works if fresh isn’t available, but fresh cloves deliver superior aroma. The salt must be Diamond Crystal kosher—its texture dissolves perfectly into the purée. Don’t substitute table salt without adjusting the quantity.

This dish holds beautifully at 150°F for up to 1 hour if you need to prep ahead. Leftovers keep in the fridge for 3-4 days and reheat best with a splash of warm milk. Avoid the microwave for large batches—it can make the texture uneven.

Step-by-Step Instructions for Steakhouse-Style Creamy Mashed Potatoes

Master these techniques to achieve the velvety texture that defines this classic side dish.

Step 1: Prepare and Boil the Russet Potatoes

Peel the 2 lb Russet Potatoes and cut them into even 1-inch cubes. This uniform size ensures they cook at the same rate. Place them in a large pot and cover with cold water by 1 inch. Add 1 tablespoon of the 1.5 tsp Kosher Salt to the water.

Bring to a boil over high heat, then reduce to a simmer. Cook for 12-15 minutes until the potatoes are fork-tender but not falling apart. Drain immediately and return to the pot. Place the pot back on low heat for 1 minute to evaporate any excess moisture—this prevents watery mashed potatoes.

Step 2: Infuse the Dairy with Garlic

While the potatoes cook, combine the 1 cup Heavy Cream, 0.5 cup Whole Milk, and 3 cloves Garlic Cloves (minced finely) in a small saucepan. Warm over medium-low heat for 3-4 minutes until tiny bubbles form at the edges—do not boil.

This gentle heating extracts the garlic’s aroma without bitterness. The 1 cup Unsalted Butter (cut into cubes) will melt into this warm mixture, creating a rich, flavorful base. Remove from heat just as the butter fully melts to maintain control over the temperature.

Step 3: Mash and Incorporate the Wet Ingredients

Using a potato masher or ricer, break down the potatoes in the pot until smooth. Avoid using a food processor, as it can make the potatoes gummy. Gradually pour in the warm garlic-infused dairy mixture while stirring with a wooden spoon.

Add the remaining 0.5 tsp Kosher Salt and 0.5 tsp Freshly Ground Black Pepper. Fold in the 0.5 cup Sour Cream and 0.25 cup Parmigiano-Reggiano Cheese until fully combined. The mixture should be ultra-creamy but still hold its shape.

Step 4: Adjust Consistency and Finish

Taste and adjust seasoning if needed. For an even smoother texture, use a whisk to incorporate any remaining lumps. If the mashed potatoes are too thick, add a splash of the reserved warm milk. The ideal consistency should be luxurious and velvety, not stiff or runny.

Transfer to a serving bowl and garnish with the 0.25 cup Chives. The residual heat will help the flavors meld further. Serve immediately while warm for the best steakhouse-style experience.

Essential Equipment for ruth chris mashed potatoes

Potato Ricer

A potato ricer is non-negotiable for that signature Ruth’s Chris texture. I use the OXO Good Grips model—it creates impossibly smooth purée without overworking the starches. The fine holes break down potatoes perfectly while preventing gluey results. 💪

Heavy Saucepan

For the dairy mixture, a 3-quart heavy saucepan with a thick base prevents scorching. I swear by my All-Clad stainless steel—it distributes heat evenly, crucial when warming cream and butter. The heavy bottom prevents hot spots that could curdle your mixture.

Wooden Spoon

When incorporating the warm dairy, a flat wooden spoon gives you better control than a whisk. The broad surface helps fold in the cream mixture gently. I keep a 12-inch bamboo spoon dedicated for mashed potatoes—it’s the perfect tool for this job.

Instant-Read Thermometer

To ensure your dairy stays at the perfect temperature, use an instant-read thermometer. I rely on my ThermoWorks ThermaPen to verify the cream mixture stays between 160-180°F. This precision prevents breaking the emulsion in your final product.

Large Mixing Bowl

A 4-quart stainless steel mixing bowl gives you room to work. The wide base makes mashing easier, and the high sides contain splatters. I prefer Cuisinox for its durability and professional weight.

Fine Mesh Strainer

For ultra-smooth results, press the potatoes through a fine mesh strainer instead of mashing. This extra step removes any remaining lumps. My 8-inch strainer from RSVP has become essential for special occasions. ✨

Frequently Asked Questions