Can I make this on the stovetop instead of a slow cooker?
Yes. Brown the beef, add broth and seasonings, bring to a simmer, then add cooked pasta, cheese, heavy cream, and sour cream. Stir until melted and heated through, about 5–10 minutes.
Should I cook the pasta before adding it to the slow cooker?
Yes, cook the penne to al dente beforehand to prevent it from becoming mushy during the long slow-cook time.
Can I use a different pasta shape?
Absolutely. Any medium pasta works—rigatoni, fusilli, or rotini will hold the creamy sauce equally well.
How do I prevent the sauce from breaking or separating?
Stir the heavy cream and sour cream gently into the warm (not boiling) beef mixture just before serving to avoid curdling.
Can I prep this ahead?
Brown and crumble the beef the day before, then combine all ingredients in the slow cooker insert and refrigerate. Cook on low when ready.