Prepare a muffin tin with paper liners or spray with nonstick baking spray. In a medium bowl whisk together the flour, baking powder, kosher salt, and poppy seeds.
2 1/2 cups All-purpose flour, 2 1/2 tsp Baking powder, 1 tsp Kosher salt, 2 tbsp Poppy seeds
In a large bowl combine the sugar and lemon zest. Using your fingers, rub the zest into the sugar until combined. Whisk in the eggs until it’s thick, about 2 minutes. Slowly whisk in the vegetable oil and melted butter until combined. Whisk in the buttermilk and lemon extract until combined.
1 cup Granulated sugar, 2 tbsp Lemon zest, 1 cup Buttermilk, 4 tbsp Unsalted butter, 2 large Eggs, 1/4 cup Vegetable oil, 2 tsp Lemon extract
Fold the dry ingredients into the wet ingredients just until combined. Do not overmix the batter will be lumpy with just a few dry flour spots. Cover the bowl with plastic wrap and let the dough rest for 15 minutes while you preheat the oven to 425 degrees F.
Divide the batter equally into the muffin cups.
Bake for 13-18 minutes or until a toothpick inserted into the center of a muffin comes out clean. Let the muffins cool in the pan for about 5 minutes, then remove the muffins from the pan and transfer to a wire rack to cool completely.