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1
Start with Alton's Sugar Cookie dough recipe.
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2
Add and sift the cocoa powder with the flour, baking powder and salt.
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3
Proceed with Sugar Cookie Dough recipe and chill for 2 hours.
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4
Preheat the oven to 375 degrees F. Stir the chopped chocolate and marmalade together in a small bowl until combined.
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5
Sprinkle a work surface and rolling pin with confectioner's sugar and roll out dough to 1/8-inch thick.
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6
Move dough frequently to prevent it from sticking and add more confectioner's sugar to the work surface and rolling pin as needed.
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7
With a 2-by-2 1/2-inch heart-shaped cookie cutter, cut 48 hearts, re-rolling dough as needed.
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8
Place half of the hearts at least 1 inch apart on two parchment-lined baking sheets.
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9
Evenly spread about 1 level teaspoon of the marmalade/chocolate mixture over each heart, leaving a 1/4-inch border around the edges.
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10
Brush the outer edge of the hearts lightly with egg-white wash. Place another dough heart over the filling and gently press the edges to seal.
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11
Continue with remaining dough cut-outs.
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12
Lightly brush the surface of the cookies with egg-white wash and sprinkle generously with sanding sugar.
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13
Bake until set, about 12-14 minutes.
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14
Let cool on the pan slightly before transferring to a rack to cool completely.
