Both red wine and porter can add rich and complex flavors to braised pork shoulder in a crockpot. The choice ultimately depends on your personal preference and the flavor profile you want to achieve.
Red wine is a classic choice for braising meats and can provide a deep, robust flavor to the pork. The tannins in red wine can help tenderize the meat and add a subtle fruitiness to the dish. A dry red wine like Cabernet Sauvignon, Merlot, or Pinot Noir would work well for braising pork shoulder.
On the other hand, using a porter can give your braised pork shoulder a distinct malty and slightly bitter flavor. Porter is a dark, rich beer style that can add depth and complexity to the dish. The roasted malt flavors in porter can complement the pork and create a delicious result. You may want to choose a porter that is not overly hoppy to avoid overwhelming the flavors.
Ultimately, it's a matter of personal taste and the flavor profile you desire for your braised pork shoulder. If you enjoy the flavors of wine and prefer a more traditional approach, red wine would be a great choice. If you prefer experimenting with beer and want a deeper, malty flavor, using a porter can be a delicious option.
Regardless of your choice, remember to add the wine or porter along with other braising liquids such as broth or vegetables, and adjust the seasoning accordingly. Braising in a crockpot can result in tender and flavorful pork shoulder, so enjoy the cooking process and the delicious outcome!