In a medium skillet, over a high heat, melt the butter. Saute the morels and mushrooms 3 to 4 minutes. Add the thyme and shallots, and cook until translucent. Add Madeira and reduce. Season with salt and pepper. Cook until the mixture is fairly dry. Cool. Transfer mixture into a food processor and puree until smooth. Add sour cream and season to taste. Place in a crock and serve with toast points.