Cheryl:
I think you are looking for this Mexican recipe... Please have a look. I got this from anotehr website a while ago. But I haven't had a chance to try it myself.
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Dawn's Pan Dulce
These Mexican sweet buns have a streusel topping. A chocolate streusel variation is included. You can shape these into seashells, ovals, or horns.

Ingredients:
6 tablespoons butter or margarine
1 cup milk
1 (.25 ounce) package active dry yeast
1 teaspoon salt
1/3 cup white sugar
5 cups all-purpose flour
2 eggs
1/2 cup white sugar
2/3 cup all-purpose flour
3 1/2 tablespoons butter or margarine
2 egg yolks
2 tablespoons cocoa, optional
1 egg beaten with 2 tablespoons milk


Directions:
1 In a small pan, combine 6 tablespoons butter or margarine and 1 cup milk; heat to 110 degrees.
2 In a large mixing bowl, combine yeast, salt, 1/3 cup sugar, and 2 cups of the flour. Pour in warmed milk mix. Beat, scraping often, with an electric mixer on medium speed for 2 minutes. Blend in 2 whole eggs and 1 cup flour; beat on high for 2 minutes. With a spoon , beat in enough of the remaining flour to form a stiff dough.
3 Knead on a floured board till smooth, about 5 minutes. Place in a greased bowl, turn to grease top, cover, and let rise until doubled.
4 While dough is rising make streusel. Stir together 1/2 cup sugar and 2/3 cup flour. Mix in 3 1/2 tablespoons cold butter or margarine. Mix to get fine crumbs. Blend in 2 egg yolks with a fork. For chocolate streusel, mix 2 tablespoons cocoa powder with flour.
5 Punch dough down, turn onto floured board. Divide into 14 pieces. Shape each into a ball. Shape 7 into seashells. Squeeze 1/4 cup of streusel into a firm ball; and press over the top of each round. Score with slightly curved parallel lines to resemble a scallop shell. Roll remaining dough into 4 by 8 inch ovals. Top each with 3 tablespoons streusel. To make horns, roll oval from short end; stop half way, fold in sides, and finish rolling. Curl ends in to form a crescent. Place buns about 2 inches apart on a greased baking sheet. Cover lightly, and allow to rise until doubled, about 45 minutes.
6 Brush buns with egg mixture. Bake at 375 degrees F (190 degrees C) until lightly browned, about 15 to 17 minutes.
Makes 14 buns