This giant oatmeal creme pie makes me smile every time I sandwich the two cookies together. It is soft, sweet, and oversized, with quick oats in the cookie and a simple vanilla creme in the middle.
Quick oats matter here. I tried bigger oats once and the cookie tasted too rustic, with flakes breaking up the soft snack-cake texture I wanted. Quick oats disappear into the dough and make the sandwich easier to bite.
The cooling time is the real test. If I fill the cookies warm, the creme melts and slides. If I wait, I get a clean, plush center and a giant cookie that cuts into wedges without drama.
Why I keep coming back to this
- It turns oatmeal creme pie flavor into one big shareable cookie.
- Quick oats make the cookie soft rather than chunky.
- The filling uses only butter, confectioners’ sugar, cream, vanilla, and salt.
- Both cookies bake on one sheet for 20-22 minutes.
- The recipe is nostalgic without needing a full batch.
- It can be sliced into wedges for serving.
What you need (and what each one is doing)
- 1/2 cup + 1 Tablespoon all-purpose flour (71g).This gives the cookies enough structure.
- 1/2 cup quick oats (43g).Quick oats create the soft classic texture.
- 1/4 teaspoon ground cinnamon.Cinnamon gives a familiar oatmeal-cookie warmth.
- 1/4 cup unsalted butter, softened (4 Tbsp; 56g).Softened butter creams into the sugar for the dough.
- 1/2 cup packed light or dark brown sugar (100g).Brown sugar keeps the cookies moist.
- 1 large egg.The egg binds the large cookies.
- 1/2 teaspoon pure vanilla extract.Vanilla flavors the cookie dough.
- 3 Tablespoons unsalted butter, softened (43g).This butter becomes the creme filling base.
- 2/3 cup confectioners’ sugar (80g).It sweetens and thickens the filling.
- 1 Tablespoon heavy cream or milk (15ml).Cream loosens the filling so it spreads.
- 1/4 teaspoon pure vanilla extract.A little vanilla flavors the creme.
- pinch salt.Salt cuts the sweetness.
How I make it
Step 1 — Prep the sheet
I preheat to 350°F (177°C) and line a large baking sheet.
Step 2 — Mix the dough
I whisk flour, quick oats, baking soda, and cinnamon. Then I beat butter until creamy, add brown sugar, egg, and vanilla, and mix in the dry ingredients until a very soft sticky dough forms.
Step 3 — Bake two cookies
I divide the dough in half, place the mounds in opposite corners with room to spread, and bake 20-22 minutes until the edges are lightly browned. They cool 15 full minutes on the sheet before moving to a rack.
Step 4 — Make the creme
I beat the filling butter until creamy, add confectioners sugar, then beat in cream and vanilla. If it is too thick, I add a few drops of cream; if too loose, a little more sugar.
Step 5 — Assemble
I frost the underside of one completely cooled cookie and top with the second. A serrated knife cuts wedges without pushing out too much filling.
Small details I do not skip
I pay attention to the pan, temperature, and resting time here because the filling only behaves when the cookies are fully cool. The numbers are not decoration; they are what keep the texture where I want it.
I also try to clean as I go. With 1 giant oatmeal creme pie, the recipe feels calmer when the measuring cups are out of the way before the final filling step. That is a small home-cook habit, but it keeps me from rushing the part that matters most.
Tips from my kitchen
- Use quick oats.Old-fashioned oats make the texture too chunky.
- Cool fully.Warm cookies melt the creme.
- Leave room to spread.The two mounds need opposite corners of the sheet.
- Adjust filling by feel.Sugar thickens and cream loosens.
- Slice gently.A serrated knife keeps the sandwich neat.
Variations I have actually tried
- Maple creme:Replace a few drops of cream with maple syrup.
- Raisin note:Add a small spoonful of finely chopped raisins to the dough.
- Chocolate drizzle:Drizzle melted chocolate over the assembled pie.
- Extra spice:Add a pinch of nutmeg with the cinnamon.
- Smaller sandwiches:Divide into 4 cookies and bake less.
Storing and reheating
I store the assembled pie covered. It is fine at room temperature for a day if the kitchen is cool; after that I refrigerate it.
The filling firms in the refrigerator, so I let slices sit 10 minutes before serving. I do not reheat it after filling.
What I serve with it
I serve wedges with cold milk or coffee. Berries on the plate help balance the sweet creme.
Frequently asked questions
Can I use old-fashioned oats?
I do not recommend it. Quick oats give the soft texture this giant creme pie needs.
Why the unusual baking soda amount?
The source uses 1/4 plus 1/8 teaspoon, and it helps the large cookies spread properly.
Can I thicken the filling?
Yes. Add confectioners sugar a spoonful at a time.
Do the cookies need to cool completely?
Yes. Warm cookies melt the creme and make the sandwich slide.
How do I store it?
Cover it tightly. Refrigerate for longer storage and let slices stand briefly before eating.
If you make this, tell me whether you shared it or treated it like a two-day cookie project.
One more thing I have learned with 1 giant oatmeal creme pie: I get the best result when I slow down at the beginning and set up every measured ingredient before mixing. It sounds fussy, but it prevents the little mistakes I make when butter is soft, the oven is hot, and I am trying to remember whether the salt already went in.
I wrote the method in the order I actually use at home. If a bowl needs scraping, a pan needs lining, or a salad needs dressing at the last second, I call that out because those small moments decide whether 1 giant oatmeal creme pie tastes intentional or merely assembled.
When I make 1 giant oatmeal creme pie again, I write one small note on the printed recipe or in my phone: how the pan behaved, whether the center needed more time, or whether the dressing amount felt right. Those notes are ordinary, but they are exactly what make a repeat batch easier in a real kitchen.
I also taste or check texture before serving instead of relying only on the timer. A timer gets me close; my eyes, a toothpick, or a quick bite tell me whether 1 giant oatmeal creme pie is actually ready for the table.
After I know the texture, then I start playing with add-ins and swaps. That order has saved me from several well-meant but strange experiments.
1 Giant Oatmeal Creme Pie
Description
A giant oatmeal creme pie made from two soft quick-oat cookies and a small-batch vanilla creme filling.
Ingredients You’ll Need
Instructions
- Preheat oven to 350°F (177°C). Line a large baking sheet.
- Whisk flour, quick oats, baking soda, and cinnamon.
- Beat 1/4 cup butter until creamy. Beat in brown sugar, egg, and 1/2 teaspoon vanilla. Mix in dry ingredients on low until soft sticky dough forms.
- Divide dough in half and place in opposite corners of baking sheet. Bake 20-22 minutes until lightly browned at edges. Cool 15 minutes on sheet, then cool completely on rack.
- Beat 3 Tablespoons butter until creamy. Add confectioners' sugar on low and beat 1 minute. Add cream and 1/4 teaspoon vanilla; beat until creamy. Adjust with cream or sugar and add a pinch of salt if desired.
- Frost underside of one cooled cookie and top with second.
Nutrition Facts
Servings 1
- Amount Per Serving
- Calories 680kcal
- % Daily Value *
- Total Fat 55g85%
- Saturated Fat 31g155%
- Trans Fat 1.9g
- Cholesterol 364mg122%
- Sodium 102mg5%
- Potassium 275mg8%
- Total Carbohydrate 32g11%
- Dietary Fiber 5g20%
- Sugars 1g
- Protein 15g30%
- Calcium 86 mg
- Iron 3.2 mg
* Percent Daily Values are based on a 2,000 calorie diet. Your daily value may be higher or lower depending on your calorie needs.
Note
Use quick oats. Old-fashioned oats make the texture too chunky.
Cool fully. Warm cookies melt the creme.
Leave room to spread. The two mounds need opposite corners of the sheet.
Adjust filling by feel. Sugar thickens and cream loosens.
Frequently Asked Questions
I do not recommend it. Quick oats give the soft texture this giant creme pie needs.
The source uses 1/4 plus 1/8 teaspoon, and it helps the large cookies spread properly.
Yes. Add confectioners sugar a spoonful at a time.
Yes. Warm cookies melt the creme and make the sandwich slide.
Cover it tightly. Refrigerate for longer storage and let slices stand briefly before eating.
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