Preheat your oven to 350 degrees. Beat sugar & eggs for 5 minutes. Then add flour, baking powder, & salt, Mix well. Heat milk and butter to boiling point,. Add to mixture & mix well. Stir in vanilla last. Pour into a 9x13 cake pan that's been spraying with nonstick spray. Bake at 350 for 35 minutes. on the 3rd rack.