Combine the flour, sugar, baking powder and salt in a large bowl. Cut the butter into the mixture until you have coarse crumbs. Whisk the milk and vanilla into the crumbs until the batter is smooth.

Grease the bottom and sides of a 4 or 5 qt crock pot insert. Spoon the batter into the bottom of the insert and spread out evenly. Sprinkle the milk chocolate chips over the batter. Spread the cherry pie filling over the batter evenly.

Place the insert into the crock pot. Place a kitchen towel over the top of the crock pot and put the lid on. The towel helps keep the condensation from the lid falling into the batter. Set the crock pot on high and cook 2 - 2/12 hours. Check the cake at 1 1/2 - 2 hours and proceed with cooking if it needs more time.

When the cake is done, remove the ceramic insert from the crock pot and cool to warm. Serve warm with ice cream or whipped cream.