Step 5: Stir in the Parmesan and Cheddar - Once the broccoli is fork tender, add the grated Parmesan and the 2 cups of freshly shredded cheddar. Stir slowly until the cheese begins melting into the hot soup. Keep
the crock pot on low just long enough for the cheese to melt completely, stirring once or twice if needed. Avoid cranking the heat higher at this point. Gentle heat helps the cheese melt smoothly and keeps the creamy base from becoming grainy.