Preheat oven to 350°F (175°C). Grease a 9x13 inch baking pan.
In a medium bowl, mix together the flour, baking powder, baking soda, and salt. Set aside.
In a large bowl, beat together the eggs, sugar, oil, and vanilla extract until light and fluffy.
Add the flour mixture and sour cream to the egg mixture and mix until just combined.
Spread the batter into the prepared pan. Sprinkle the poppy seeds over the top. Bake for 30 minutes or until a toothpick inserted into the center comes out clean.
Let cool completely before cutting into slices. Dust with powdered sugar before serving.
Interesting Facts
Poppy seed rolls are a popular dessert in many European countries.
Poppy seeds are a good source of iron, calcium, and fiber.
This dessert is usually served at family gatherings, special occasions, and holidays.