Peach Pound Cake

• 2 peaches
• 2 egg (white)
• 325 gr unbleached flour (white)
• 230 ml low-fat lemon yogurt
• 200 gr sugar
• 170 gr margarine
• 28 gr brown sugar
• 8 gr unbleached flour (white)
• 5 gr baking powder
• 4 gr vanilla