Purple Sweet Potato Casserole
Okinawan purple sweet potatoes blended with sweetened condensed milk, butter, and cinnamon, baked under a brown sugar pecan streusel. A colorful side for Thanksgiving and Christmas.
Servings: 8 servings
Calories: 340kcal
Equipment
- Steamer
- Food processor
- MIxing Bowl
- 10x7 baking dish
Ingredients
Filling
- 623 grams Okinawan purple sweet potatoes about 4, or 1⅓ pounds
- 4 tablespoons salted butter melted
- ⅔ cup sweetened condensed milk
- 1 large egg
- 1 teaspoon ground cinnamon
- ⅛ teaspoon salt
Pecan streusel
- ½ cup pecans roughly chopped
- ¼ cup packed brown sugar
- ¼ cup all-purpose flour
- 3 tablespoons salted butter melted
- Pinch of salt
Instructions
- Steam the sweet potatoes whole, skin on, for 20 to 30 minutes, until a fork slides in easily.623 grams Okinawan purple sweet potatoes
- Let them cool just enough to handle, then peel. Preheat the oven to 350°F.
- Blend the warm potatoes in a food processor until smooth. Add the melted butter, condensed milk, cinnamon, and salt, and pulse until combined. Taste, then pulse in the egg.4 tablespoons salted butter, ⅔ cup sweetened condensed milk, 1 teaspoon ground cinnamon, ⅛ teaspoon salt, 1 large egg
- Spread the filling evenly in an ungreased 10x7 baking dish.
- Stir together the pecans, brown sugar, flour, and salt. Pour in the melted butter and mix until it forms crumbs.½ cup pecans, ¼ cup packed brown sugar, ¼ cup all-purpose flour, 3 tablespoons salted butter, Pinch of salt
- Scatter the streusel over the filling and bake for 30 minutes, until the streusel is golden.
- Serve warm, straight from the oven.
Notes
- Sweet potatoes: Use Okinawan sweet potatoes, with beige skin and purple flesh. Purple-skinned Japanese sweet potatoes are pale inside and won’t give you the color.
- Condensed milk: Use sweetened condensed milk, not evaporated milk.
- Butter: I use salted butter. If you only have unsalted, add a small pinch more salt to the filling.
- Leftovers: Refrigerate covered for up to 3 to 4 days. Reheat loosely covered with foil so the streusel doesn’t over-brown.
Nutrition
Calories: 340kcal | Carbohydrates: 40g | Protein: 5g | Fat: 18g | Sugar: 24g
