Preheat oven, 350°F/171°C. Grease a bundt pan with shortening and dust lightly with all-purpose flour. Set aside.
In a bowl, combine cake mix, water, eggs, and oil.
Pour cake batter into prepared bundt pan.
Bake for 25-30 minutes or until cake is set.
While the cake is baking, prepare peanut butter lava.
In a small sauce pan, add in milk and white chocolate chips. Heat over low flame and stir constantly until the white chocolate melts. Add in the peanut butter and stir until smooth.
Place bundt cake in a serving dish, pour the peanut butter lava on the center of the cake filling it up to the top. Drizzle with chocolate syrup. Serve.