diff --git a/src/main/groovy-tests/recipeMapTests.groovy b/src/main/groovy-tests/recipeMapTests.groovy
index b72663c6..46bf8560 100644
--- a/src/main/groovy-tests/recipeMapTests.groovy
+++ b/src/main/groovy-tests/recipeMapTests.groovy
@@ -3,6 +3,7 @@
 import com.nomiceu.nomilabs.groovy.ChangeRecipeBuilder
 
 import gregtech.api.recipes.RecipeBuilder
+import gregtech.api.recipes.RecipeMaps
 import gregtech.api.recipes.chance.output.impl.ChancedItemOutput
 import gregtech.api.recipes.ingredients.nbtmatch.NBTCondition
 import gregtech.api.recipes.ingredients.nbtmatch.NBTMatcher
@@ -77,7 +78,25 @@ mods.gregtech.assembler.recipeBuilder()
     .inputNBT(ore('dyeBlue'), NBTMatcher.ANY, NBTCondition.ANY)
     .inputWildNBT(ore('dyeRed')) // Same as above (Except the OreDict of course)
     .outputs(item('minecraft:apple') * 64)
-    .EUt(30).duration(VA[LV])
+    .EUt(VA[LV]).duration(30)
+    .buildAndRegister()
+
+// Replace Recipes
+// A ReplaceByOutput on the recipe builder's recipe map, with the outputs (and other info) specified up to that point, will be conducted.
+// Remember that ReplaceByOutput ignores amount!
+
+// Variations: `replace(RecipeMap<?>... otherMaps), `replace(Predicate<Recipe> condition, RecipeMap<?>... otherMaps)`,
+// `replaceInCategory(RecipeMap<?>... otherMaps)`, `replaceWithVoltage(RecipeMap<?>... otherMaps)`,
+// `replaceWithExactVoltage(RecipeMap<?>... otherMaps)`
+
+// Other Maps also have the recipe removed from them. Useful when a recipe is auto-registered to multiple recipe maps (e.g. Chemical Reactor)
+// Example: Changing the Recipe for Multi-Layer Fiber Reinforced Circuit Board (with Recycling)
+mods.gregtech.chemical_reactor.recipeBuilder()
+    .inputs(metaitem('board.wetware') * 6, metaitem('circuit_assembler.iv') * 5)
+    .fluidInputs(fluid('rhodium') * 144)
+    .outputs(metaitem('board.multilayer.fiber_reinforced') * 12)
+    .EUt(VA[OpV]).duration(1_000_000)
+    .replace(RecipeMaps.LARGE_CHEMICAL_RECIPES) // Chem Reactor recipes are also registered to Large Chemical Reactor's Recipe Map
     .buildAndRegister()
 
 // Change Recipes
diff --git a/src/main/java/com/nomiceu/nomilabs/mixin/gregtech/RecipeBuilderMixin.java b/src/main/java/com/nomiceu/nomilabs/mixin/gregtech/RecipeBuilderMixin.java
index 3ae8dad1..1db9dc79 100644
--- a/src/main/java/com/nomiceu/nomilabs/mixin/gregtech/RecipeBuilderMixin.java
+++ b/src/main/java/com/nomiceu/nomilabs/mixin/gregtech/RecipeBuilderMixin.java
@@ -1,18 +1,32 @@
 package com.nomiceu.nomilabs.mixin.gregtech;
 
+import java.util.Arrays;
 import java.util.List;
+import java.util.Objects;
+import java.util.function.Consumer;
+import java.util.function.Predicate;
 
 import net.minecraft.item.ItemStack;
+import net.minecraftforge.fluids.FluidStack;
 
+import org.jetbrains.annotations.Nullable;
 import org.spongepowered.asm.mixin.Final;
 import org.spongepowered.asm.mixin.Mixin;
 import org.spongepowered.asm.mixin.Shadow;
 import org.spongepowered.asm.mixin.Unique;
 
+import com.cleanroommc.groovyscript.api.GroovyLog;
 import com.cleanroommc.groovyscript.api.IIngredient;
+import com.nomiceu.nomilabs.gregtech.mixinhelper.AccessibleRecipeMap;
 import com.nomiceu.nomilabs.groovy.RecyclingHelper;
+import com.nomiceu.nomilabs.util.LabsGroovyHelper;
 
+import gregtech.api.recipes.Recipe;
 import gregtech.api.recipes.RecipeBuilder;
+import gregtech.api.recipes.RecipeMap;
+import gregtech.api.recipes.category.GTRecipeCategory;
+import gregtech.api.recipes.chance.output.impl.ChancedFluidOutput;
+import gregtech.api.recipes.chance.output.impl.ChancedItemOutput;
 import gregtech.api.recipes.ingredients.GTRecipeInput;
 import gregtech.api.recipes.ingredients.nbtmatch.NBTCondition;
 import gregtech.api.recipes.ingredients.nbtmatch.NBTMatcher;
@@ -41,6 +55,27 @@ private static GTRecipeInput ofGroovyIngredient(IIngredient ingredient) {
         return null;
     }
 
+    @Shadow
+    protected RecipeMap<R> recipeMap;
+
+    @Shadow
+    @Final
+    protected List<FluidStack> fluidOutputs;
+
+    @Shadow
+    @Final
+    protected List<ChancedItemOutput> chancedOutputs;
+
+    @Shadow
+    @Final
+    protected List<ChancedFluidOutput> chancedFluidOutputs;
+
+    @Shadow
+    protected int EUt;
+
+    @Shadow
+    protected GTRecipeCategory category;
+
     @Unique
     @SuppressWarnings("unused")
     public R changeRecycling() {
@@ -60,4 +95,84 @@ public R inputNBT(IIngredient ingredient, NBTMatcher matcher, NBTCondition condi
     public R inputWildNBT(IIngredient ingredient) {
         return inputNBT(ingredient, NBTMatcher.ANY, NBTCondition.ANY);
     }
+
+    @Unique
+    @SuppressWarnings("unused")
+    public R replace(RecipeMap<?>... otherMaps) {
+        return replaceForMaps(otherMaps, (map) -> removeOrWarn(map,
+                ((AccessibleRecipeMap) map).findByOutput(outputs, fluidOutputs, chancedOutputs,
+                        chancedFluidOutputs,
+                        (r) -> true),
+                String.format("items: %s, fluids: %s, chanced items: %s, chanced fluids: %s", outputs, fluidOutputs,
+                        chancedOutputs, chancedFluidOutputs)));
+    }
+
+    @Unique
+    @SuppressWarnings("unused")
+    public R replaceInCategory(RecipeMap<?>... otherMaps) {
+        return replaceForMaps(otherMaps, (map) -> removeOrWarn(map,
+                ((AccessibleRecipeMap) map).findByOutput(outputs, fluidOutputs, chancedOutputs,
+                        chancedFluidOutputs,
+                        (r) -> Objects.equals(category, r.getRecipeCategory())),
+                String.format("category: %s, items: %s, fluids: %s, chanced items: %s, chanced fluids: %s", category,
+                        outputs, fluidOutputs,
+                        chancedOutputs, chancedFluidOutputs)));
+    }
+
+    @Unique
+    @SuppressWarnings("unused")
+    public R replaceWithVoltage(RecipeMap<?>... otherMaps) {
+        return replaceForMaps(otherMaps, (map) -> removeOrWarn(map,
+                ((AccessibleRecipeMap) map).findRecipeByOutput(EUt, outputs, fluidOutputs, chancedOutputs,
+                        chancedFluidOutputs),
+                String.format("voltage: %s, items: %s, fluids: %s, chanced items: %s, chanced fluids: %s", EUt, outputs,
+                        fluidOutputs,
+                        chancedOutputs, chancedFluidOutputs)));
+    }
+
+    @Unique
+    @SuppressWarnings("unused")
+    public R replaceWithExactVoltage(RecipeMap<?>... otherMaps) {
+        return replaceForMaps(otherMaps, (map) -> removeOrWarn(map,
+                ((AccessibleRecipeMap) map).findRecipeByOutput(EUt, outputs, fluidOutputs, chancedOutputs,
+                        chancedFluidOutputs),
+                String.format("exact voltage: %s, items: %s, fluids: %s, chanced items: %s, chanced fluids: %s", EUt,
+                        outputs, fluidOutputs,
+                        chancedOutputs, chancedFluidOutputs)));
+    }
+
+    @Unique
+    @SuppressWarnings("unused")
+    public R replace(Predicate<Recipe> canHandle, RecipeMap<?>... otherMaps) {
+        return replaceForMaps(otherMaps, (map) -> removeOrWarn(map,
+                ((AccessibleRecipeMap) map).findByOutput(outputs, fluidOutputs, chancedOutputs,
+                        chancedFluidOutputs,
+                        canHandle),
+                String.format("items: %s, fluids: %s, chanced items: %s, chanced fluids: %s", outputs, fluidOutputs,
+                        chancedOutputs, chancedFluidOutputs)));
+    }
+
+    @Unique
+    private R replaceForMaps(RecipeMap<?>[] otherMaps, Consumer<RecipeMap<?>> remover) {
+        remover.accept(recipeMap);
+        Arrays.stream(otherMaps).forEach(remover);
+        return (R) (Object) this;
+    }
+
+    @Unique
+    private void removeOrWarn(RecipeMap<?> currMap, @Nullable List<Recipe> foundRecipes, String components) {
+        if (foundRecipes == null) {
+            if (LabsGroovyHelper.isRunningGroovyScripts()) {
+                GroovyLog.msg("Error removing GregTech " + currMap.unlocalizedName + " recipe")
+                        .add("could not find recipe for: " + components)
+                        .error()
+                        .post();
+            }
+            return;
+        }
+
+        for (var recipe : foundRecipes) {
+            currMap.removeRecipe(recipe);
+        }
+    }
 }