Beat cake mix, pudding, water, eggs, and oil for 8 minutes at medium speed. Add butter extract and vanilla. (1 Tablespoon of each).
Pour 1/2 of batter mixture into the greased pan.
Mix white sugar and cinnamon and sprinkle 1/2 of this over the batter. Spread rest of batter into pan and then rest of sugar/cinnamon on top of that. Take a knife and swirl through the mixture. Bake for 30-35 minutes.
Let cake cool and drizzle with glaze: Powdered sugar, hot milk, butter extract and vanilla extract.