Preheat oven to 350 degrees F (175 degrees C). Grease 24 muffin cups, or use paper liners. Sift together the flour, baking powder and salt. Set aside.
Cream together the margarine, brown sugar and white sugar in a large bowl until light and fluffy. Beat in the eggs one at a time, then stir in the vanilla. Beat in the flour mixture alternately with the milk, mixing just until incorporated.
Fill each muffin cup 1/3 full, and place a chocolate egg in the center of each. Top with remaining batter until cups are 2/3 full.
Bake in preheated oven for 18 to 20 minutes, or until golden brown, and tops spring back when lightly tapped.
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