- 4 medium-size sweet potatoes
- 3/4 cup butter or margarine, divided
- 1 teaspoon ground cardamom
- 6 medium-size Yukon gold potatoes, peeled and quartered
- 1/2 cup sour cream
- 1 teaspoon dried thyme
- 1 teaspoon salt
- 1/2 teaspoon pepper
- 1/2 cup milk
- Garnish: fresh thyme sprigs
- COOK sweet potatoes in boiling water to cover 45 minutes or until tender. Drain, cool, and peel.
- BEAT sweet potatoes, 1/2 cup butter, and cardamom at medium speed with an electric mixer until smooth. Set aside.
- COOK gold potatoes in boiling water to cover 10 minutes or until tender. Drain.
- BEAT gold potatoes and remaining 1/4 cup butter at medium speed with electric mixer until mashed. Add sour cream and next 3 ingredients, beating until smooth. Add milk, 1 tablespoon at a time, beating until desired consistency.
- DROP alternating heaping tablespoons of potato mixtures into a lightly greased 13- x 9-inch baking dish. Swirl gently with a knife.
- BAKE, covered, at 325 degrees for 30 minutes or until thoroughly heated. Garnish, if desired.