Choc Raspberry Mug Cake

• 2 tbsp (30 g) self raising flour
• 2 tsp unsweetened cocoa powder
• 0.25 tsp teaspoon baking powder
• 0.1 tsp salt
• 1 tbsp maple syrup
• 2 tbsp (40ml) milk
• 1 tsp extra virgin olive oil
• 0.125 tsp vanilla extract
• 0.25 cup frozen raspberries
• 1 tbsp chocolate chips
• 1 tbsp peanut butter (optional)