That Bag of Potato Chips Is Begging for Our Homemade French Onion Dip

Name: That Bag of Potato Chips Is Begging for Our Homemade French Onion Dip
Ingredients: 3 tablespoons unsalted butter; 3 medium red onions , halved and thinly sliced; 1 tablespoon Worcestershire sauce; 1 1/2 cups sour cream , at room temperature; 8 ounces cream cheese , softened; 1 tablespoon finely chopped flat-leaf parsley , plus more for garnish; 1/2 teaspoon onion powder; 1 teaspoon grated beef bouillon cube; Kosher salt; Freshly ground black pepper; Kettle-cooked potato chips , for serving