Turn on your oven as high as it goes (the perfect temperature to bake a pizza would be 400°C/750F).
Place into a blender the amaretti biscuits, the cocoa powder, the amaretto liqueur and the syrup and blend until smooth.
Slice the peach into fairly thin slices.
Spread and shape the pizza dough and prick it with a fork a few times in the center so that the dough won't rise in the center.
Bake the pizza dough until the dough will start to look cooked, but will not have yet turned brown around the edge of the crust. The timing for this phase largely depends on how hot your oven gets. Mine gets to 300°C/570F and for my oven it takes around 3 minutes to reach this point.
Remove your dough from the oven, spread the cocoa amaretto filling on it keeping one or two tablespoons aside for decoration and arrange the peach slices on it.
Bake the sweet pizza until the crust will turn brown.
Spread the cocoa amaretto filling you had kept aside on top of the sweet pizza and enjoy either warm or cold.