I found this recipe at Mommy's Kitchen. I love her recipes!!!!

Egg Nog Coffee Cake

1 - cup granulated sugar
1/2 - cup butter, softened
1 - cup eggnog
1 - 8 oz container sour cream
1 - teaspoon rum or butter extract
2 - eggs
2 1/2 - cups all-purpose flour
1 1/2 - teaspoons baking powder
1/2 - teaspoon baking soda
1/2 - teaspoon salt

Struesel Topping:
1/3 - cup granulated sugar
1 - tablespoon all-purpose flour
1 - tablespoon butter, softened
1/4 - teaspoon ground nutmeg
1/4 - teaspoon cinnamon

Grease bottom only of rectangular pan, 13x9x2 inches, with shortening. In small bowl, mix all Streusel Topping ingredients with fork until crumbly; set aside.

In large bowl, beat 1 cup granulated sugar and 1/2 cup butter with electric mixer on medium speed, or mix with spoon. Beat in 1 cup eggnog, the sour cream, rum or butter extract and eggs until blended. Stir in 2 1/2 cups flour, the baking powder, baking soda and salt. Spread in pan.

Sprinkle Streusel Topping over batter. Cover and refrigerate at least 8 hours. Heat oven to 350°F. Uncover pan; bake 35 to 40 minutes or until toothpick inserted in center comes out clean. Cool 20 minutes and then drizzle with the egg nog glaze.

Egg Nog Glaze:
1/2 - cup powdered sugar
1-2 - tablespoon Egg Nog

In small bowl, mix all Eggnog Glaze ingredients until smooth and thin enough to drizzle. Drizzle over coffee cake. (I doubled the glaze recipe).