Place the steak in a large plastic storage bag. Whisk together the soy sauce, brown sugar, steak seasoning, minced onion and garlic. Shake to coat. Marinate overnight in the refrigerator.
Prepare: Heat a few drizzles of oil in a large skillet over high heat. Remove the steak from the marinade and add to the pan. Discard the marinade.
Lower heat to medium high. Let steak sit to form a crust for a couple of minutes, then turn and repeat. Saute the steak for around 4-5 minutes total or until your desired doneness and browned. Remove from the pan.
Add additional olive oil to the pan. Saute the mushrooms and onions for 5-7 minutes scraping any brown bits from the bottom of the pan. Season with an additional 1/2-1 tsp of steak seasoning salt and fresh thyme leaves. Adjust seasonings to your taste.
Once the mushrooms and onions have browned and the juices released add the cream to the pan.
Mix thoroughly, scraping any brown bits from the bottom of the pan. Return steak back to the pan cooking just until heated through.
Serve immediately over mashed potatoes or buttered rice.
Notes
Steak - Steak tips are small bite size cubes of steak that can be made using several types of beef. You can use sirloin, ribeye, tenderloin, new york strip steak or top sirloin in this recipe. Each type of steak will cook differently depending on the cut and fat content, so should you choose to adapt adjust the cooking time accordingly.
SauteedMushrooms - You can use button mushrooms, portabella mushrooms or cremini mushrooms in this recipe. You may opt to go with your favorite variety. If you don't like mushrooms, you can omit them altogether.
Onion - You can use a sweet onion like Vidalia onion, red onion or a yellow onion for a stronger onion flavor.
Soy Sauce - You could use teriyaki sauce or worcestershire sauce, in place of soy sauce.
Spice - You could add crushed red pepper flakes for spice.
Bell Peppers - You could toss in thinly sliced green bell pepper, or use it in place of mushrooms.
Cook the Steak Your Way - Keep in mind, the cooking time can always be adjusted to suit the level of doneness that you personally enjoy.
Steak Seasoning - Use a really quality brand of steak seasoning that you enjoy. Chicago steak seasoning and Montreal steak seasoning are two popular easy to find brands, but you can use your favorite! It's an important part of the flavor profile overall, don't skimp.
Double the Sauce - If you'd like to double the sauce, go for it and adjust the amount to smother the steak tips to suit your taste. It's a meal that feels indulgent so, treat yourself, you've earned it.