Salvadorian "Quesadilla" Cake

Preheat oven to 400°F with rack in middle. Line bottom and sides of pan with parchment paper.

Whisk together flour, baking powder, and salt. Beat butter and sugar in another bowl with an electric mixer at medium-high speed until pale, about 1 minute. Beat in eggs, sour cream, and cheese.

Reduce speed to low and mix in milk. Add flour mixture and mix until just combined.

Transfer batter to pan and smooth top. Sprinkle with sesame seeds (if using). Bake until a wooden pick or skewer inserted into center of cake comes out clean, 30 to 40 minutes.

Cool to warm in pan, 20 to 30 minutes. Turn cake out onto a rack. Serve cake slightly warm or at room temperature.