Mix ½ cup of the flour, ancho chile pepper, and baking soda in a small bowl and set aside.
Microwave chocolate and butter in a large bowl on HIGH for 2 minutes or until butter is melted. Stir until chocolate is completely melted.
Stir in granulated sugar and vanilla. Beat in eggs one at a time.
Gradually beat in the ancho-flour mixture on low speed until just blended.
Add remaining ¾ cup flour alternately with water, beating until well blended after each addition.
Spoon batter into 12 paper-lined muffin cups, filling each about two-thirds full.
Bake 18 to 20 minutes or until a toothpick inserted into the center comes out clean. Cool 10 minutes, remove from pans, and cool completely.
For frosting: Beat butter and hibiscus flowers until light and fluffy. Gradually beat in confectioners’ sugar until smooth. Add water and beat until fluffy.
Frost cupcakes with hibiscus buttercream frosting.
Notes
Recipe adapted from McCormick.com. Hibiscus adds a tangy, floral note that beautifully balances the chocolate’s richness.