Preheat over to 350 degrees.
Generously butter a 9x13 baking dish.
In a large bowl add the eggs and sugar. Beat with an electric mixer on medium for 5 to 7 minutes or until the mixture forms a ribbon when pulling up the beaters.
Add the butter and vanilla extract. Continue to mix on medium for 2 more minutes.
Mix in the flour until just combined.
Be sure to coat the cranberries with 1 T flour to help the cranberries from sinking.Gently stir in the coated cranberries until incorporated. Pour the mixture into the prepared baking dish.
Bake for 40 to 50 minutes or until the top is lightly brown and a toothpick inserted in the center comes out clean.
Allow the cake to cool before serving.
Enjoy!