Twyla'S Berry Cake

Ingredients

• 1/3 c. margarine
• 1 c. sugar
• 1 egg
• 2 c. flour
• 1/2 tsp. salt
• 1 1/2 tsp. baking soda
• 1 c. milk
• 1 tsp. vanilla
• 1 1/2 c. berries
• 1 1/2 c. powdered sugar
• 1 tsp. melted margarine
• 3 Tbsp. cream or berry juice