I start by melting butter in my largest pot over medium heat. Then in go the diced onions; I cook them until they become soft and slightly translucent. Smelling that golden onion is one of my favorite parts — it smells like dinner already!
Sprinkle the flour over the softened onions and garlic and stir constantly for about 1–2 minutes. This gets rid of the raw flour taste and helps the soup thicken beautifully once we add liquid.
Slowly pour in the chicken stock while whisking so the roux dissolves into the liquid. Then I add the whole tomatoes (don’t drain them!), sugar, salt, and pepper — it’s starting to smell amazing now!
I use my immersion blender right in the pot to make the soup perfectly smooth — no chunks! If you don’t have one, just blend in batches with your regular blender and return it to the pot.
While the soup simmers gently, I prepare the Cheddar Bay biscuit dough according to package directions with added shredded cheddar. This dough will be thick and cheesy — exactly how dumplings should be!
Using a spoon, I drop little dough mounds into the bubbling soup. Then cover and let them cook for about 10–12 minutes — don’t lift that lid! Let the steam do its magic.
Finally, I whisk the melted butter with the seasoning packet and brush it on top of the dumplings for that signature Cheddar Bay kick. It’s such a tasty finish — you’ll want to lick the spoon!