How to Make It
Preheat the oven to 350°F. Line a 12-hole muffin pan with paper liners.
Sift the flours, baking powder, and baking soda into a large bowl. Make a hole in the center of the dry ingredients and pour in the eggs, coconut oil or butter, sugar, orange zest, and poppy seeds. Use a metal spoon to fold the wet ingredients into the dry, adding in the milk to loosen to a dropping consistency.
Fill each muffin liner two thirds full and top with a slice of orange. Bake for 18 to 20 minutes, until a skewer inserted into the center of each muffin comes out clean.
Serve warm or cold. These muffins will keep in an airtight container for up to two days.