sweet potato muffins stuffed with cinnamon-mascarpone
from vanillasugarblog.com
muffins slightly adapted from Noble Pig

Muffins:
2 & ½ cups AP flour
1 & ¾ ts baking powder
½ ts table salt
¼ ts baking soda
¼ ts ground nutmeg
1/3 cup buttermilk
1/3 cup heavy or light cream
¾ cup plain sweet potato puree
1 & ½ ts good quality vanilla extract
1 stick unsalted butter, room temperature
3/4 cup dark brown sugar
2 eggs

Stuffing:
8 oz. mascarpone cheese, room temp.
Big pinch of salt
½ cup of sifted confectioners’ sugar
2 ts ground cinnamon
½ stick unsalted butter, room temp.

¼ cup or less of crushed walnuts or pecans (for garnish)
Cinnamon-sugar mixture to sprinkle on tops of muffins before baking.

In a medium bowl, combine all purpose flour, baking powder, salt, baking soda and ground nutmeg. Set aside. In a large bowl combine cream, buttermilk, sweet potato puree and vanilla extract. Set aside.
In a large bowl, cream the butter and dark brown sugar with an electric mixer, until fluffy. Add eggs, one at a time, beating well after each addition.
Alternately mix in dry and wet ingredients into the butter, starting and ending with the dry; mix only until each addition is incorporated -- Please do not overmix.
Coat a muffin pan with nonstick spray and fill muffin cups 1/2 full. Sprinkle the tops of the muffins with a generous amount of cinnamon-sugar mixture. Bake in a 350 degree oven for 20-25 minutes, or until a toothpick inserted into the center of the muffin comes out clean. (mine were done at the 20 minute mark).

For the stuffing: combine all ingredients and beat with an electric mixer or with stand mixer. Beat until well incorporated. To fill the muffins, all I did was cut out a large hole in the tops of the muffins and filled them with the stuffing. Use a pastry bag and pipe in the stuffing. If you don’t have a pastry bag you can use a plastic ziplock bag and snip a small hole at one of the edges. Decorate the tops of the muffins with crushed walnuts or pecans.
If you want the best muffin tins around, use what I use from Williams Sonoma. I get tons of miles out of these, and I bake, a lot.