Preheat your oven to 375ºF. While it’s heating, grab your muffin pan and spray it with nonstick cooking spray to ensure easy muffin removal later.
In a large bowl, whisk together 3 cups of all-purpose flour, 1 cup of sugar, 2 tbsp of poppy seeds, 1 tbsp of baking powder, ½ tsp of baking soda, and ½ tsp of salt. This mixture will serve as the dry base for your muffins, so make sure it’s well combined.
In a separate bowl, combine 1½ cups of sour cream, 1½ tbsp of grated lemon zest, 1 tsp of vanilla extract, ½ tsp of lemon extract, 2 tbsp of fresh lemon juice, and 2 large eggs. Whisk these together until smooth. This mixture will add moisture and flavor to the dry ingredients.
Pour the wet ingredients into the dry ingredients and gently fold everything together until just combined. Be careful not to overmix, as this can lead to dense muffins.
Next, add ½ cup of melted unsalted butter to the mixture and stir gently until well combined. The butter adds richness and flavor that will elevate your muffins.
Scoop the batter into the prepared muffin tin using a large cookie scoop, filling each cup about two-thirds full to allow room for rising. This step is crucial for uniform muffin size.
Place the muffin pan in the oven and bake for about 20 to 25 minutes, or until the muffins are golden brown and a toothpick inserted into the center comes out clean. While they’re baking, you can prepare the lemon syrup.
In a small saucepan, combine ¼ cup of lemon juice and ¼ cup of sugar. Cook over medium heat, stirring occasionally, until the sugar dissolves. This lemon syrup will soak into the muffins for added flavor.
Once the muffins are baked, remove the pan from the oven and let it cool for a few minutes. Using a toothpick or skewer, poke holes in the tops of the muffins, allowing them to absorb the lemon syrup.
Brush the warm muffins with the lemon syrup for a sweet glaze. After a few minutes, gently remove the muffins from the pan and place them on a wire rack to cool completely.
To make the glaze, stir together 1 cup of powdered sugar and 1-2 tbsp of lemon juice until smooth. Drizzle this over the cooled muffins for an extra touch of sweetness.
Enjoy your freshly baked Lemon Poppy Seed Muffins warm or at room temperature!