Preheat oven to 350F
Whisk dry ingredients in a large bowl until combined
Add wet ingredients and mix with a spatula until smooth. Add poppy seeds and lemon zest and stir to combine.
Spoon batter into muffin liner cups, leaving about a centimeter of space at the top of the cup.
Slice raspberries into halves or leave whole and place on top of the muffins generously.
Bake for about 20-25 minutes or until tops are golden brown.