Tender cubes of sirloin luxuriate in a silky garlic-butter bath while the slow cooker does every last ounce of work. No searing, no splatter, no sweat—just the most succulent, low-carb steak bites you’ve ever met.

Ingredients You'll Need

Quality ingredients make the difference between “good” and “I-need-this-on-repeat.” Below is exactly what I buy, why I buy it, and the swaps that keep things keto when the pantry runs low.

The Steak

I reach for top sirloin—it’s lean enough to stay keto-friendly yet marbled enough to stay juicy after a long, slow simmer. Look for a bright cherry-red piece with thin white veins of fat running through the center. If sirloin prices spike, flat-iron or tri-tip work; just trim the larger fat caps so the final bites aren’t greasy.

The Butter

Use European-style, 82 % butterfat for the richest mouthfeel. Grass-fed adds a subtle herbaceous note that plays beautifully with garlic. Need dairy-free? Replace two-thirds of the butter with refined coconut oil and the remaining third with ghee to keep the buttery flavor.

The Garlic

Freshly minced cloves give a sweet, rounded aroma. In a pinch, jarred minced garlic packed in water is acceptable; skip the dried stuff—it turns acrid in the slow cooker.

Umami Boosters

Coconut aminos: soy-free, lower-carb alternative to soy sauce.
Worcestershire: choose a brand with 1 g carbs or less per 5 ml.
Dijon mustard: adds tang and helps emulsify the butter.

Herbs & Spices

Smoked paprika supplies subtle campfire notes, while fresh thyme leaves give a gentle piney lift. If you only have dried thyme, use one-third the amount and crush it between your palms to wake up the oils.

Thickener (Optional)

A tiny sprinkle of xanthan gum (⅛ tsp) turns the buttery juices into a glossy gravy. If you avoid gums, simply reduce the sauce afterward on the stovetop.

Why This Recipe Works

Hands-off cooking: Dump, set, forget—come back to steak-house flavor.
Butter basting built-in: Slow heat keeps butter below browning point, so every cube self-bastes.
Keto macros perfected: 78 % fat, 20 % protein, 2 % carbs—no math required.
Freezer-friendly: Make a double batch; freeze half the bites in single-serve pouches.
One pot, zero stovetop: Perfect for hot summer days or when the stove is occupied.
Kid-approved mild flavor: Butter mellows the garlic—no fiery bite.

How to Make Keto Slow Cooker Garlic Butter Steak Bites

Cube & Pat

Trim silver skin, then cut steak into 1-inch (2.5 cm) cubes—large enough to stay pink in the center yet small enough to eat in one bite. Pat very dry with paper towels; moisture is the enemy of browning (even in a slow cooker, surface dryness concentrates flavor).

Season Generously

Combine 1 tsp kosher salt, ½ tsp black pepper, ½ tsp smoked paprika, and ¼ tsp onion powder. Toss cubes in a bowl until evenly coated. The salt begins to dissolve and seasons the interior during the long cook.

Build the Butter Base

Melt ½ cup (113 g) butter in a small skillet over medium-low heat. Add 6 minced garlic cloves and cook just until fragrant—about 45 seconds. You’re not browning; you’re infusing. Off heat, whisk in 2 Tbsp coconut aminos, 1 Tbsp Worcestershire, 1 Tbsp Dijon, and 1 tsp fresh thyme leaves.

Layer & Distribute

Pour one-third of the garlic butter into the slow cooker; swirl to coat the base. Add steak bites in an even layer. Drizzle remaining butter over top. Keeping the butter on top prevents the meat from braising in plain water released during cooking.

Low & Slow

Cover and cook on LOW for 2½–3 hours. Check at 2½ hours: an instant-read thermometer should register 125 °F (52 °C) for medium-rare. Because slow cookers vary, use temperature, not time, as your guide.

Butter Baste Finale

Once target temp is hit, switch the cooker to WARM. Tilt the insert with a potholder and spoon the butter over the steak for 1 full minute. This final bath equalizes temperature and gives surface gloss.

Optional Gravy Thicken

Transfer butter juices to a small saucepan. Whisk in ⅛ tsp xanthan gum and simmer 1 minute. For a dairy-heavy sauce, thin with 1–2 Tbsp beef broth until nappe consistency.

Serve & Garnish

Transfer steak bites to a warm platter. Shower with chopped parsley, cracked pepper, and a final pat of cold butter for sheen. Serve straight from the crock on KEEP WARM for parties.

Expert Tips

Probe, Don’t Guess

Slow cookers run 15–20 °F hotter on the outer edges. Insert a digital probe horizontally through the lid vent for continuous reading.

Chill Before Freezing

Cool steak bites completely in the butter; the fat protects against freezer burn. Freeze in silicone bags, then reheat directly in a 140 °F sous-vide bath.

Butter Separation Fix

If butter breaks, whisk 1 tsp hot cooking liquid into 1 tsp arrowroot starch; return to cooker and stir 30 seconds to re-emulsify.

Batch Size Rule

Do not exceed 1.5 lb (680 g) steak in a 4-qt cooker; overcrowding drops temperature and causes rubbery meat.

Color Contrast

Add ¼ tsp turmeric to the paprika for a deeper amber hue that photographs beautifully.

Overnight Marry

Refrigerate cooked steak bites in their butter overnight; next-day flavor rivals left-over pizza.

Variations to Try

1

Spicy Cajun

Swap smoked paprika for 1 tsp Cajun seasoning and add ¼ tsp cayenne. Finish with diced pickled jalapeños.
2

Mushroom & Thyme

Add 8 oz cremini quarters on the bottom of the slow cooker; they soak up butter and create a built-in side dish.
3

Lemon Pepper

Replace Dijon with 1 tsp lemon zest and 1 Tbsp cracked peppercorns. Bright and zesty!
4

Surf & Turf

Add peeled, deveined shrimp during the last 15 minutes on LOW; butter gently poaches them.
5

Blue Cheese Finish

Crumble ¼ cup keto-approved blue cheese over bites just before serving; cover 2 minutes to soften.

Storage Tips

Refrigerator

Store steak bites submerged in their butter in an airtight container up to 4 days. The fat cap seals out oxygen, keeping meat remarkably moist.

Freezer

Portion cooled steak and butter into 4-oz silicone muffin trays. Freeze solid, pop out, and transfer to a zip bag. Keeps 3 months. Reheat from frozen in a covered skillet with 1 Tbsp water over medium-low, 6–7 minutes.

Meal-Prep Bowls

Divide steak bites, cauliflower mash, and roasted broccoli among 4 glass containers. Spoon 1 Tbsp garlic butter over each. Refrigerate; microwave 60–75 seconds to serve.

Frequently Asked Questions

You can, but chuck needs 6–8 hours on LOW to break down collagen. For steak-bite texture, stick with sirloin or round. If using chuck, cube smaller (½-inch) and plan for a full work-day cook.

Not if you keep the cooker on LOW. High heat triggers allicin breakdown into bitter compounds; gentle heat keeps it sweet.

Use a probe thermometer set to 125 °F. Switch to WARM immediately; the thermal mass of butter will coast to perfect medium-rare without carry-over heat.

Yes, but use a 6-qt cooker and keep meat in a single layer. Double all ingredients except butter—use ¾ cup instead of 1 full cup to avoid overflow.

Almost—simply omit the Worcestershire (it contains sugar). Replace with 1 Tbsp coconut aminos plus ½ tsp anchovy paste for umami.

Cauliflower mash, zucchini noodles, roasted asparagus, or a crisp wedge salad with avocado-ranch. All keep net carbs under 5 g per serving.