Heat Guinness to 115°F. Dissolve yeast and sugar in Guinness. Allow to proof for 5 minutes. 

Prepare a stand mixer with dough hook attachment. Combine flour and salt in stand mixer bowl. With mixer running on low, slowly add yeast mixture, followed by olive oil. Mix until a smooth ball of dough forms. Add additional flour or olive oil as needed. 

Transfer dough to a greased bowl. Cover and allow to rise in a warm location for 1 hour, or until doubled in size. 

Preheat oven to 425°F. Prepare a baking sheet with parchment paper or olive oil. Shape dough into a 10-inch circle. Add toppings, bake for 20-25 minutes or until desired crispness is reached. 

Slice and serve warm.