Winter Berry Forest Cake in a Cup

Ingredients

• 2 eggs room temperature
• 2 tsp vanilla
• 1/2 cup butter
• 1 1/4 cup brown sugar
• 1 3/4 cup all-purpose flour
• 2/3 cup dark cocoa powder unsweetened (70%)
• 1 tsp baking powder
• 1 tsp baking soda
• 1/2 tsp salt
• 1/2 cup chocolate chips
• 1 cup blackberries
• 1 cup raspberries
• ¼ cup water
• 1 Tbsp cornstarch
• 1 Tbsp lemon juice
• 2 Tbsp sugar
• Canned whipped cream
• ¼ cup Mint leaves