Add noodles, butter, and cream: Stir in the egg noodles, butter, and heavy cream into the slow cooker.
Cook the noodles: Cover the slow cooker again and cook on high for an additional 30-40 minutes, or until the noodles are cooked to al dente (tender but slightly firm).
Add peas (optional): If using frozen peas, stir them into the slow cooker and let them warm through for about 5 minutes.
Adjust seasoning and serve: Taste the dish and adjust the seasoning with more salt and pepper if needed. Serve warm and enjoy this comforting meal!
