Heat butter and oil in a large saucepan until sizzling.
2 tablespoons butter, 1 tablespoon olive oil
Then add all the vegetables and pancetta, and stir occasionally for 10 minutes. You want the vegetables to soften up a bit. Add the garlic for the last 30 seconds to 1 minute.
1 onion, chopped (one cup), 2 celery stalks, chopped (one cup), 2 carrots, chopped (one cup), 2 cloves garlic, finely chopped
Lower the heat a bit and add the meats. Gently cook them by stirring and breaking up any clumps. After about 10 minutes, season with salt & pepper.
4 ounces pancetta, chopped, 9 ounces ground beef, 9 ounces ground pork, Salt and pepper
Add the wine and stir for about 5 minutes until reduced. You may have to turn up the heat a little bit for this step.
½ cup white wine
Now add the crushed tomatoes and about a cup of beef stock and bring to a boil.
28 ounce can of crushed Italian plum tomatoes, 3 cups beef stock
Next, lower the heat to a gentle simmer, and over the next two hours, occasionally stir and add beef stock as needed to keep the ragu from sticking to the pan.
3 cups beef stock
Add heavy cream, stir very well, and let simmer for another 30 minutes.
½ cup heavy cream
Add some more stock to your bolognese (you want the sauce to be pretty runny).
½ cup beef stock