Guava Cake (Masa Real de Guayaba)

2 cups (500 ml) all-purpose flour
1 cup (250 ml) sugar
3 tsp (15 ml) baking powder
1 tsp (5 ml) salt
3 eggs plus 1 egg yolk
1/2 lb (225 g) butter, melted
3 Tbs (45 ml) dry sherry or water
1 1/2 lbs (675 g) guava paste, cut into 1/4-inch (5 mm) slices

Combine the dry ingredients in a mixing bowl. Add the eggs, butter,
and sherry and mix with a wooden spoon until thoroughly combined.
Place half the dough into a greased 9x12 inch (23x30 cm) baking
pan, pressing it with your fingers to make a smooth, even layer.
Top with the slices of guava paste and spread the remaining batter
over the top. Bake in a preheated 350F (180C) oven until lightly
browned, about 40 minutes. Cool to room temperature before cutting
into 2-inch (5 cm) squares. Serves 8 to 12.