1 pound Velveeta, cut into 1-inch cubes
1 cup milk
1 to 2 tablespoons hot sauce, such as Frank's Red Hot or Cholula
Tortilla chips, for serving
Place the Velveeta, milk, and hot sauce in a 1 1/2-quart or larger slow cooker. Cover and cook on the LOW setting until the Velveeta is completely melted, about 1 hour.
Whisk until smooth, then turn the slow-cooker setting to WARM if your slow cooker has that setting. If your slow cooker doesn't have a warm setting, leave on LOW uncovered to keep the dip warm without burning. Serve warm with tortilla chips and toppings.