Lightly spray a piece of parchment paper AND a 12” cast iron pan.
Line the parchment paper in the pan so the sides extend at least 1/2” above the edges of the pan.
Pour the Guinness into a large cup.
Carefully spoon off the foam and discard.
Measure out 1 cup of the beer and set aside.
Whisk together the flour, 1 1/2 cups of cheddar, sugar, salt, baking powder and baking soda in a large mixing bowl.
Add in the butter cubes and using a pastry cutter, cut in the butter until the mixture resembles very coarse crumbs with bits of butter still visible here and there.
Stir in Guinness and vinegar until you have a shaggy, messy dough.
Mix everything together in the bowl with your hands into a cohesive dough that holds together without kneading it.
Shape into a dome and transfer to the parchment lined pan.
Gently score a cross pattern into the top without deflating the dough.
Brush the top lightly with cream and 1/2 cup cheddar and bake for 35 – 40 minutes or until golden and crusty and bottom sounds hollow when tapped.
Carefully grabbing the parchment paper, transfer it and the bread immediately to a cooling rack and cool completely before slicing, or just break into quarters along the score lines.