01 -
In a large pot, melt butter over medium heat. Add chopped onion and cook until translucent. Stir in flour and cook for 1 minute, stirring constantly to form a roux.
02 -
Slowly pour in chicken broth and canned tomatoes while stirring continuously until mixture is smooth. Bring to a boil, then reduce heat to a simmer. Season with sugar, salt, and black pepper.
03 -
For a smoother consistency, divide the soup into two portions and puree each separately in a blender. Return pureed soup to pot and bring back to a simmer.
04 -
Prepare the biscuit mix according to package directions. Drop spoonfuls of batter into the simmering soup until all batter is used.
05 -
Cover pot and cook for 15-20 minutes or until dumplings are completely cooked through and no longer doughy.
06 -
Melt 2 tablespoons of butter and mix with the seasoning packet provided in the biscuit mix. Drizzle over soup before serving.