Stir together the oats and sour cream and allow to sit for 5 minutes to soften the oats. Meanwhile, on low heat melt the butter and then remove from the heat.
Mix well with the oats the melted butter, oil, beaten eggs, granulated sugar, brown sugar, vanilla extract and lime zest. In a separate bowl, stir together the flour, baking powder, cinnamon, nutmeg and salt. Add the dry ingredients to the wet ingredient and mix until the batter just comes together. You don’t want to over work the batter as this will affect the muffin’s rising in the oven so it’s okay if it’s lumpy. Gently stir in the blueberries (if using frozen, do not thaw them first).
Fill the muffin cups 3/4 full and bake for 20-25 minutes or until lightly browned on top and when a knife inserted into the muffin comes out clean. Serve warm.
Blueberry lime oatmeal muffins | www.homesicktexan.com