I found another version of the IHOP's Harvest Grain & Nut Pancakes. Hope this helps.

COPYCAT IHOP HARVEST GRAIN AND NUT PANCAKES
Source: JustaQT
Servings: 4-8

3/4 cup Quaker Oats
3/4 cup whole-wheat flour
2 teaspoons baking soda
1 teaspoon baking powder
1/2 teaspoon salt
1 1/2 cups buttermilk
1/4 cup vegetable oil
1 egg
1/4 cup sugar
3 tablespoons finely chopped blanched almonds
3 tablespoons chopped walnuts

Lightly oil a skillet or griddle, and preheat it to medium heat.

Grind the oats in a blender or food processor until fine, like flour.

Combine ground oats, whole wheat flour, baking soda, baking powder and salt in a medium bowl.

In another bowl combine buttermilk, oil, egg and sugar with an electric mixer until smooth.

Combine dry ingredients with wet ingredients, add nuts and mix well with mixer.

Ladle 1/3 cup of the batter onto the hot skillet and cook the pancakes for 2 to 4 minutes per side or until brown.