Strawberry Doughnut Muffins

Name: Strawberry Doughnut Muffins
Ingredients: Nonstick vegetable oil spray; 5 Tbsp. refined coconut oil, room temperature; 4 Tbsp. unsalted butter, room temperature; ½ cup (100 g) granulated sugar; ⅓ cup (packed; 67 g) light brown sugar; 2 large eggs; 1½ tsp. baking powder; ¼ tsp. baking soda; 1½ tsp. Diamond Crystal or ¾ tsp. Morton kosher salt; 1 tsp. vanilla extract; 2¼ cups (281 g) all-purpose flour; 1 cup sour cream; ½ cup thick strawberry or other berry jam (such as Bonne Maman Intense or Crofter’s); 6 Tbsp. unsalted butter; ½ cup freeze-dried strawberries; 6 Tbsp. granulated sugar; Pinch of kosher salt; A spice mill or a mortar and pestle