Preheat the oven to 350. Line a 12 cup muffin tin with paper liners and set aside.
In a large bowl, whisk together the melted butter and sugar. Add the egg, almond extract, sour cream, and milk, and mix until combined.
In a small bowl, whisk together the flour, baking powder, salt, and poppy seeds. Add the dry ingredients to the wet ingredients, and mix until just combined.
Scoop the batter into the prepared muffin tin, filling 3/4 full. Bake 16-18 minutes, or until the tops of the muffins spring back when touched lightly.