Preheat oven to 350°F (177°C). Grease the interior of a 9-inch pie pan.
Add eggs, sugar, flour and milk into a blender. Blend until all ingredients are incorporated and evenly mixed. Pour batter into prepared pie pan.
Bake for about 45 minutes or until toothpick inserted comes out clean. The pie will also start to pull away from the sides. Let pie cool to room temperature. The pie will deflate a little as it cools. Place pie into fridge for several hours or overnight to chill and to let the flavors fully develop. If desired, dust pie with powdered sugar before serving. Pie is best served chilled.