Whisk together the all-purpose flour, sugar, baking powder and salt in a large bowl.
2 cups all-purpose flour, 1 cup granulated sugar, 2 teaspoons baking powder, ½ teaspoon salt
Mix in the lemon zest to the dry ingredients.
2 teaspoons lemon zest
Add the milk, vegetable oil, lemon juice and beaten egg to the dry ingredients. Stir till just mixed. Do not overmix.
1 cup milk, ⅓ cup vegetable oil, 2 tablespoons lemon juice, 1 egg
Gently fold in the raspberries. Being careful to not break them up.
1 cup raspberries
Using an ice cream scoop, fill the 12 muffin cups evenly.
Place the muffin pan into the 400°F. oven and bake for 20 - 25 minutes. Muffins are done when a tooth pick is inserted and comes out with a moist crumb and they are golden brown.
Storage
In an airtight container, these muffins will keep up to three days at room temperature. For long term storage, place the muffins into a resealable freezer bag and freeze for up to two months.
Notes
For best results, let the egg come to room temperature.
When using fresh raspberries, wash and pat dry with a paper towel. Gently toss the raspberries with one tablespoon of flour before adding to the batter. This will keep the raspberries from sinking to the bottom of the muffins.