The Best Fluffy Pancakes recipe you will fall in love with. Full of tips and tricks to help you make the best pancakes.
Every December my family does one movie night that’s non-negotiable, and it’s the Grinch. A few years ago I wanted a dessert that matched the screen, and this Grinch poke cake is what stuck. Green on top. Green cake underneath. And when you cut a square, little pockets of red strawberry Jell-O show up inside like the heart that finally grew. Nobody planned that part. It just happens when the gelatin settles into the holes, and it’s the reason the kids ask for it by name now.
It starts with a box of white cake mix. I’m not apologizing for that. The point here is color and a cold, soft, fruity bite, and a box mix gives you a tight white crumb that takes green dye better than most scratch batters I’ve tried.
Why This Grinch Poke Cake Works
Egg whites only, no yolks. Yolks tint the batter yellow, and yellow plus green dye gives you a sort of pea-soup shade. Whites keep the base clean, so the green comes out bright on the first try.
Gel coloring, not the little liquid bottles. My first attempt used grocery-store liquid drops. Half the bottle went in and the batter was still pale mint, plus the extra liquid made the cake bake up slightly gummy in the middle. Gel is concentrated. A quarter teaspoon of leaf green does what that whole bottle couldn’t.
Fifteen minutes of cooling, then poke. This timing matters more than it looks. Poke a cake straight out of the oven and the crumb tears into ragged craters; pour gelatin into those and the center turns soggy. Wait until it’s fully cold and the gelatin pools on top instead of soaking down. Warm, not hot, is the window where the holes stay neat and the Jell-O travels all the way to the bottom.
The cold water in the gelatin. Adding ½ cup cold water after dissolving brings the mixture down a little, so it’s thin enough to flow into the holes but not so hot it cooks the cake surface.
Ingredients
For the green cake
- 1 box (15.25 oz) Betty Crocker Super Moist white cake mix
- 1 cup water
- ½ cup Wesson vegetable oil
- 3 large egg whites
- Wilton Leaf Green gel food coloring (about ¼ teaspoon, plus a dab for the topping)
For the strawberry poke
- 1 box (3 oz) Jell-O strawberry gelatin
- 1 cup boiling water
- ½ cup cold water
For the topping
- 1 tub (8 oz) Cool Whip whipped topping, thawed
- Wilton green jimmies sprinkles (about 2 tablespoons)
- Wilton red heart sprinkles (about 1 tablespoon)
How to Make Grinch Poke Cake
- Prep the pan. Preheat the oven to 350°F. Grease a 9×13-inch baking dish.
- Mix the batter. Beat the cake mix, water, oil, and egg whites until smooth, about 2 minutes on medium.
- Turn it green. Add the gel coloring a little at a time and mix until the batter is bright Grinch green. It bakes up a shade lighter, so go one step darker than you think.
- Bake. Pour into the dish, spread level, and bake 25–30 minutes, until a toothpick in the center comes out clean.
- Cool briefly. Let the cake sit for 15 minutes. No longer.
- Poke. Use the round handle of a wooden spoon to poke holes all over, roughly every 1½ inches. I end up with about 48 holes. Push straight down to the bottom and wiggle slightly.
- Make the gelatin. Stir the strawberry Jell-O into 1 cup boiling water for 2 full minutes, until no grains remain. Stir in ½ cup cold water.
- Fill the holes. Pour slowly, aiming for the holes first, then drizzle the rest over the surface.
- Chill. Cover and refrigerate at least 2 hours, until the cake is cold all the way through.
- Tint the topping. Gently fold a tiny dab of green gel into the thawed Cool Whip. Fold, don’t beat.
- Frost and decorate. Spread the green topping over the cake. Scatter green jimmies, then red hearts.
- Serve. Slice into squares and serve cold.
Prep time: 20 minutes Cook time: 30 minutes Cool + chill time: 2 hours 15 minutes Total time: about 3 hours 5 minutes Servings: 15 squares
Dessert • American
Grinch Poke Cake – Green Christmas Cake with Red Heart Sprinkles
A bright green white-cake poke cake filled with strawberry Jell-O, topped with green Cool Whip, green jimmies and red heart sprinkles. Makes 15 squares.
Ingredients 11 items
- Green Cake
- Strawberry Poke
- Topping
Instructions 12 steps
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1
Prep the pan
Preheat the oven to 350°F (175°C). Grease a 9x13-inch baking dish.
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2
Mix the batter
Beat the cake mix, water, vegetable oil and egg whites until smooth, about 2 minutes on medium speed.
-
3
Color it green
Add the gel food coloring a little at a time until the batter is bright Grinch green. Go one shade darker than you want; it lightens slightly in the oven.
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4
Bake
Pour the batter into the dish and spread it level. Bake 25 to 30 minutes, until a toothpick in the center comes out clean. Start checking at 25 minutes.
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5
Cool briefly
Let the cake cool for 15 minutes. It should still be warm when you poke it.
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6
Poke the holes
Use the round handle of a wooden spoon to poke holes all over the cake, about every 1 1/2 inches, pushing all the way to the bottom.
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7
Make the gelatin
Stir the strawberry gelatin into 1 cup boiling water for 2 full minutes until completely dissolved. Stir in 1/2 cup cold water.
-
8
Fill the holes
Slowly pour the gelatin over the cake, aiming for the holes first, then drizzle the rest over the surface.
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9
Chill
Cover and refrigerate for at least 2 hours, until the cake is cold all the way through.
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10
Tint the topping
Gently fold a small dab of green gel coloring into the thawed Cool Whip. Fold rather than beat so it stays fluffy.
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11
Frost and decorate
Spread the green topping evenly over the cake. Scatter the green jimmies, then the red heart sprinkles, ideally within 4 hours of serving.
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12
Slice and serve
Cut into 15 squares and serve chilled. Keep leftovers covered in the fridge for 3 to 4 days.
Tips & Substitutions
Use egg whites only so the green stays bright, not yellowish.
Gel coloring works far better than liquid drops, which thin the batter and stay pale.
Poke the cake after 15 minutes of cooling, while it is still warm, so the gelatin soaks all the way down.
Add the red heart sprinkles within 4 hours of serving; they bleed pink into the topping overnight.
The cake and gelatin layer can be made a day ahead. Do not freeze.
Nutrition Facts
255 kcal / serving
Protein2g
Carbs34g
Fat12g
Fiber0g
Tips From My Kitchen
- Toothpick at 25 minutes. My oven runs a bit hot, and one batch at 30 went dry around the edges, which then soaked up gelatin unevenly.
- Stir the Jell-O longer than you think. Undissolved sugar grains sink into the holes and turn gritty.
- Cool Whip has to be fully thawed — overnight in the fridge. Half-frozen topping tears the top of the cake when you spread it.
- Fold the green in. Beating Cool Whip deflates it and it goes shiny and loose.
- Hearts go on last, and close to serving. I once decorated the night before and woke up to pink halos bleeding out around every single heart. The jimmies held fine. The hearts didn’t.
- Wipe the knife between cuts if you want those clean edges for photos.
Variations
Cherry Jell-O. Swap in cherry for a deeper red that reads more “Christmas” inside the slice. Honestly my second favorite version.
Raspberry Jell-O. Tarter, a little more grown-up. Good.
Lime Jell-O. I’d skip this one. It sounds on-theme, but green on green means you lose the red pockets entirely, and that’s the whole reason the cake exists.
Vanilla pudding poke. Instant vanilla pudding (made with milk) poured over instead of gelatin gives a denser, creamier cake. Nice, but it’s a different dessert.
Homemade whipped cream. It works on day one. By day two, unstabilized cream starts to weep onto the cake. Cool Whip holds its shape in the fridge for days, so for this cake I stay with the tub.
Make-Ahead and Storage
The cake and gelatin layer can be made a full day ahead. That’s actually my favorite way, because the Jell-O sets firmer overnight and the squares cut cleaner.
The green topping can go on the morning of. Sprinkles, though, should go on within about 4 hours of serving, especially the red hearts.
Freezing? Don’t. The gelatin pockets get icy and watery once thawed, and the cake turns spongy.
Leftovers keep covered in the fridge for 3 to 4 days.
Grinch Poke Cake FAQ
Can I use a 13.25 oz cake mix box?
Yes. Newer Betty Crocker boxes are smaller, and the cake still fills a 9×13, just a slightly thinner layer. Start checking it at 22 minutes.
Do I have to use egg whites?
For the color, yes. Whole eggs make the green duller and a bit yellow.
Why did my Jell-O sit on top instead of soaking in?
The cake was too cold, or the holes weren’t deep enough. Poke all the way to the bottom of the pan while the cake is still warm, and pour slowly so each hole fills before it overflows.
How long does poke cake need to chill?
At least 2 hours. Overnight is better if you have the time — firmer gelatin, neater squares, and the flavor spreads through more of the crumb.
Can I use liquid food coloring instead of gel?
You can, but I wouldn’t. You’ll need a lot of it to get a real green, the extra liquid throws off the batter, and the color still lands closer to mint than Grinch.
Does Grinch poke cake need to be refrigerated?
Yes, always. Cool Whip and gelatin both need the fridge. Out on a buffet table, give it about 2 hours max.
Closing Thoughts
If you’re serving this on a movie night, cut the squares smaller than you’d think — about 2 inches — and set them out on a white plate. The green pops against it, and the red pockets show from the side. A mug of hot cocoa next to it is the right pairing; something warm and plain against something cold and fruity. And if you have a little one who likes helping, give them the red hearts. Just make sure that part happens right before everyone sits down.
