Preheat oven to 425 degrees F. and line a pizza pan with parchment paper.
Combine 1 cup flour, undissolved yeast, sugar and salt in a large bowl. Add very warm water and oil; mix until well blended, about 1 minute. Gradually add enough remaining flour to make a soft dough. Dough should form a ball and will be slightly sticky. Knead on a floured surface, adding additional flour if necessary, until smooth and elastic, about 4 minutes. Pat dough with floured hands to fill greased pizza pan or baking sheet. OR roll dough on a floured counter to 12-inch circle; place in greased pizza pan or baking sheet. Form a rim by pinching the edge of the dough.
Spread peanut butter over crust then top evenly with chocolate. Bake for 8 minutes then top with marshmallows. Bake for another 4-5 minutes until marshmallows are puffed and golden. Remove and let cool. Top with broken pieces of graham cracker and drizzle with melted chocolate. Cut into wedges and serve warm.
Notes
Use Fresh Ingredients. Make sure to check your yeast and other ingredients to make sure they are fresh.
Use Chocolate Melts. For easy chocolate to melt, I like to use the Ghirardelli chocolate melts. They melt nice and easy in the microwave.